21637980

素因数分解:

$2^2\times 3^2\times 5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{1321}}^1$

素因数の和:1356

約数の個数: 144

約数和(自身を含む): 80842944

約数和(自身を除く): 59204964

約数列:

[1, 2, 3, 4, 5, 6, 7, 9, 10, 12, 13, 14, 15, 18, 20, 21, 26, 28, 30, 35, 36, 39, 42, 45, 52, 60, 63, 65, 70, 78, 84, 90, 91, 105, 117, 126, 130, 140, 156, 180, 182, 195, 210, 234, 252, 260, 273, 315, 364, 390, 420, 455, 468, 546, 585, 630, 780, 819, 910, 1092, 1170, 1260, 1321, 1365, 1638, 1820, 2340, 2642, 2730, 3276, 3963, 4095, 5284, 5460, 6605, 7926, 8190, 9247, 11889, 13210, 15852, 16380, 17173, 18494, 19815, 23778, 26420, 27741, 34346, 36988, 39630, 46235, 47556, 51519, 55482, 59445, 68692, 79260, 83223, 85865, 92470, 103038, 110964, 118890, 120211, 138705, 154557, 166446, 171730, 184940, 206076, 237780, 240422, 257595, 277410, 309114, 332892, 343460, 360633, 416115, 480844, 515190, 554820, 601055, 618228, 721266, 772785, 832230, 1030380, 1081899, 1202110, 1442532, 1545570, 1664460, 1803165, 2163798, 2404220, 3091140, 3606330, 4327596, 5409495, 7212660, 10818990, 21637980]

約数ペア:

[(1, 21637980), (2, 10818990), (3, 7212660), (4, 5409495), (5, 4327596), (6, 3606330), (7, 3091140), (9, 2404220), (10, 2163798), (12, 1803165), (13, 1664460), (14, 1545570), (15, 1442532), (18, 1202110), (20, 1081899), (21, 1030380), (26, 832230), (28, 772785), (30, 721266), (35, 618228), (36, 601055), (39, 554820), (42, 515190), (45, 480844), (52, 416115), (60, 360633), (63, 343460), (65, 332892), (70, 309114), (78, 277410), (84, 257595), (90, 240422), (91, 237780), (105, 206076), (117, 184940), (126, 171730), (130, 166446), (140, 154557), (156, 138705), (180, 120211), (182, 118890), (195, 110964), (210, 103038), (234, 92470), (252, 85865), (260, 83223), (273, 79260), (315, 68692), (364, 59445), (390, 55482), (420, 51519), (455, 47556), (468, 46235), (546, 39630), (585, 36988), (630, 34346), (780, 27741), (819, 26420), (910, 23778), (1092, 19815), (1170, 18494), (1260, 17173), (1321, 16380), (1365, 15852), (1638, 13210), (1820, 11889), (2340, 9247), (2642, 8190), (2730, 7926), (3276, 6605), (3963, 5460), (4095, 5284)]