21385980

素因数分解:

$2^2\times 3^2\times 5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{1543}}^1$

素因数の和:1576

約数の個数: 144

約数和(自身を含む): 80930304

約数和(自身を除く): 59544324

約数列:

[1, 2, 3, 4, 5, 6, 7, 9, 10, 11, 12, 14, 15, 18, 20, 21, 22, 28, 30, 33, 35, 36, 42, 44, 45, 55, 60, 63, 66, 70, 77, 84, 90, 99, 105, 110, 126, 132, 140, 154, 165, 180, 198, 210, 220, 231, 252, 308, 315, 330, 385, 396, 420, 462, 495, 630, 660, 693, 770, 924, 990, 1155, 1260, 1386, 1540, 1543, 1980, 2310, 2772, 3086, 3465, 4620, 4629, 6172, 6930, 7715, 9258, 10801, 13860, 13887, 15430, 16973, 18516, 21602, 23145, 27774, 30860, 32403, 33946, 43204, 46290, 50919, 54005, 55548, 64806, 67892, 69435, 84865, 92580, 97209, 101838, 108010, 118811, 129612, 138870, 152757, 162015, 169730, 194418, 203676, 216020, 237622, 254595, 277740, 305514, 324030, 339460, 356433, 388836, 475244, 486045, 509190, 594055, 611028, 648060, 712866, 763785, 972090, 1018380, 1069299, 1188110, 1425732, 1527570, 1782165, 1944180, 2138598, 2376220, 3055140, 3564330, 4277196, 5346495, 7128660, 10692990, 21385980]

約数ペア:

[(1, 21385980), (2, 10692990), (3, 7128660), (4, 5346495), (5, 4277196), (6, 3564330), (7, 3055140), (9, 2376220), (10, 2138598), (11, 1944180), (12, 1782165), (14, 1527570), (15, 1425732), (18, 1188110), (20, 1069299), (21, 1018380), (22, 972090), (28, 763785), (30, 712866), (33, 648060), (35, 611028), (36, 594055), (42, 509190), (44, 486045), (45, 475244), (55, 388836), (60, 356433), (63, 339460), (66, 324030), (70, 305514), (77, 277740), (84, 254595), (90, 237622), (99, 216020), (105, 203676), (110, 194418), (126, 169730), (132, 162015), (140, 152757), (154, 138870), (165, 129612), (180, 118811), (198, 108010), (210, 101838), (220, 97209), (231, 92580), (252, 84865), (308, 69435), (315, 67892), (330, 64806), (385, 55548), (396, 54005), (420, 50919), (462, 46290), (495, 43204), (630, 33946), (660, 32403), (693, 30860), (770, 27774), (924, 23145), (990, 21602), (1155, 18516), (1260, 16973), (1386, 15430), (1540, 13887), (1543, 13860), (1980, 10801), (2310, 9258), (2772, 7715), (3086, 6930), (3465, 6172), (4620, 4629)]