17901940

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{71}}^1\times {\mathrm{1801}}^1$

素因数の和:1888

約数の個数: 48

約数和(自身を含む): 43593984

約数和(自身を除く): 25692044

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 71, 140, 142, 284, 355, 497, 710, 994, 1420, 1801, 1988, 2485, 3602, 4970, 7204, 9005, 9940, 12607, 18010, 25214, 36020, 50428, 63035, 126070, 127871, 252140, 255742, 511484, 639355, 895097, 1278710, 1790194, 2557420, 3580388, 4475485, 8950970, 17901940]

約数ペア:

[(1, 17901940), (2, 8950970), (4, 4475485), (5, 3580388), (7, 2557420), (10, 1790194), (14, 1278710), (20, 895097), (28, 639355), (35, 511484), (70, 255742), (71, 252140), (140, 127871), (142, 126070), (284, 63035), (355, 50428), (497, 36020), (710, 25214), (994, 18010), (1420, 12607), (1801, 9940), (1988, 9005), (2485, 7204), (3602, 4970)]