643269940

素因数分解:

$2^2\times 5^1\times {\mathrm{71}}^1\times {\mathrm{613}}^1\times {\mathrm{739}}^1$

素因数の和:1432

約数の個数: 48

約数和(自身を含む): 1373984640

約数和(自身を除く): 730714700

約数列:

[1, 2, 4, 5, 10, 20, 71, 142, 284, 355, 613, 710, 739, 1226, 1420, 1478, 2452, 2956, 3065, 3695, 6130, 7390, 12260, 14780, 43523, 52469, 87046, 104938, 174092, 209876, 217615, 262345, 435230, 453007, 524690, 870460, 906014, 1049380, 1812028, 2265035, 4530070, 9060140, 32163497, 64326994, 128653988, 160817485, 321634970, 643269940]

約数ペア:

[(1, 643269940), (2, 321634970), (4, 160817485), (5, 128653988), (10, 64326994), (20, 32163497), (71, 9060140), (142, 4530070), (284, 2265035), (355, 1812028), (613, 1049380), (710, 906014), (739, 870460), (1226, 524690), (1420, 453007), (1478, 435230), (2452, 262345), (2956, 217615), (3065, 209876), (3695, 174092), (6130, 104938), (7390, 87046), (12260, 52469), (14780, 43523)]