20211448725

素因数分解:

$3^3\times 5^2\times {\mathrm{13}}^1\times {\mathrm{61}}^2\times {\mathrm{619}}^1$

素因数の和:773

約数の個数: 144

約数和(自身を含む): 40717185600

約数和(自身を除く): 20505736875

約数列:

[1, 3, 5, 9, 13, 15, 25, 27, 39, 45, 61, 65, 75, 117, 135, 183, 195, 225, 305, 325, 351, 549, 585, 619, 675, 793, 915, 975, 1525, 1647, 1755, 1857, 2379, 2745, 2925, 3095, 3721, 3965, 4575, 5571, 7137, 8047, 8235, 8775, 9285, 11163, 11895, 13725, 15475, 16713, 18605, 19825, 21411, 24141, 27855, 33489, 35685, 37759, 40235, 41175, 46425, 48373, 55815, 59475, 72423, 83565, 93025, 100467, 107055, 113277, 120705, 139275, 145119, 167445, 178425, 188795, 201175, 217269, 241865, 279075, 339831, 362115, 417825, 435357, 490867, 502335, 535275, 566385, 603525, 725595, 837225, 943975, 1019493, 1086345, 1209325, 1306071, 1472601, 1699155, 1810575, 2176785, 2303299, 2454335, 2511675, 2831925, 3627975, 4417803, 5097465, 5431725, 6530355, 6909897, 7363005, 8495775, 10883925, 11516495, 12271675, 13253409, 20729691, 22089015, 25487325, 29942887, 32651775, 34549485, 36815025, 57582475, 62189073, 66267045, 89828661, 103648455, 110445075, 149714435, 172747425, 269485983, 310945365, 331335225, 449143305, 518242275, 748572175, 808457949, 1347429915, 1554726825, 2245716525, 4042289745, 6737149575, 20211448725]

約数ペア:

[(1, 20211448725), (3, 6737149575), (5, 4042289745), (9, 2245716525), (13, 1554726825), (15, 1347429915), (25, 808457949), (27, 748572175), (39, 518242275), (45, 449143305), (61, 331335225), (65, 310945365), (75, 269485983), (117, 172747425), (135, 149714435), (183, 110445075), (195, 103648455), (225, 89828661), (305, 66267045), (325, 62189073), (351, 57582475), (549, 36815025), (585, 34549485), (619, 32651775), (675, 29942887), (793, 25487325), (915, 22089015), (975, 20729691), (1525, 13253409), (1647, 12271675), (1755, 11516495), (1857, 10883925), (2379, 8495775), (2745, 7363005), (2925, 6909897), (3095, 6530355), (3721, 5431725), (3965, 5097465), (4575, 4417803), (5571, 3627975), (7137, 2831925), (8047, 2511675), (8235, 2454335), (8775, 2303299), (9285, 2176785), (11163, 1810575), (11895, 1699155), (13725, 1472601), (15475, 1306071), (16713, 1209325), (18605, 1086345), (19825, 1019493), (21411, 943975), (24141, 837225), (27855, 725595), (33489, 603525), (35685, 566385), (37759, 535275), (40235, 502335), (41175, 490867), (46425, 435357), (48373, 417825), (55815, 362115), (59475, 339831), (72423, 279075), (83565, 241865), (93025, 217269), (100467, 201175), (107055, 188795), (113277, 178425), (120705, 167445), (139275, 145119)]