20645380

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{31}}^1\times {\mathrm{67}}^1\times {\mathrm{71}}^1$

素因数の和:185

約数の個数: 96

約数和(自身を含む): 52641792

約数和(自身を除く): 31996412

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 31, 35, 62, 67, 70, 71, 124, 134, 140, 142, 155, 217, 268, 284, 310, 335, 355, 434, 469, 497, 620, 670, 710, 868, 938, 994, 1085, 1340, 1420, 1876, 1988, 2077, 2170, 2201, 2345, 2485, 4154, 4340, 4402, 4690, 4757, 4970, 8308, 8804, 9380, 9514, 9940, 10385, 11005, 14539, 15407, 19028, 20770, 22010, 23785, 29078, 30814, 33299, 41540, 44020, 47570, 58156, 61628, 66598, 72695, 77035, 95140, 133196, 145390, 147467, 154070, 166495, 290780, 294934, 308140, 332990, 589868, 665980, 737335, 1032269, 1474670, 2064538, 2949340, 4129076, 5161345, 10322690, 20645380]

約数ペア:

[(1, 20645380), (2, 10322690), (4, 5161345), (5, 4129076), (7, 2949340), (10, 2064538), (14, 1474670), (20, 1032269), (28, 737335), (31, 665980), (35, 589868), (62, 332990), (67, 308140), (70, 294934), (71, 290780), (124, 166495), (134, 154070), (140, 147467), (142, 145390), (155, 133196), (217, 95140), (268, 77035), (284, 72695), (310, 66598), (335, 61628), (355, 58156), (434, 47570), (469, 44020), (497, 41540), (620, 33299), (670, 30814), (710, 29078), (868, 23785), (938, 22010), (994, 20770), (1085, 19028), (1340, 15407), (1420, 14539), (1876, 11005), (1988, 10385), (2077, 9940), (2170, 9514), (2201, 9380), (2345, 8804), (2485, 8308), (4154, 4970), (4340, 4757), (4402, 4690)]