648340

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{421}}^1$

素因数の和:448

約数の個数: 48

約数和(自身を含む): 1701504

約数和(自身を除く): 1053164

約数列:

[1, 2, 4, 5, 7, 10, 11, 14, 20, 22, 28, 35, 44, 55, 70, 77, 110, 140, 154, 220, 308, 385, 421, 770, 842, 1540, 1684, 2105, 2947, 4210, 4631, 5894, 8420, 9262, 11788, 14735, 18524, 23155, 29470, 32417, 46310, 58940, 64834, 92620, 129668, 162085, 324170, 648340]

約数ペア:

[(1, 648340), (2, 324170), (4, 162085), (5, 129668), (7, 92620), (10, 64834), (11, 58940), (14, 46310), (20, 32417), (22, 29470), (28, 23155), (35, 18524), (44, 14735), (55, 11788), (70, 9262), (77, 8420), (110, 5894), (140, 4631), (154, 4210), (220, 2947), (308, 2105), (385, 1684), (421, 1540), (770, 842)]