1620220

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{71}}^1\times {\mathrm{163}}^1$

素因数の和:250

約数の個数: 48

約数和(自身を含む): 3967488

約数和(自身を除く): 2347268

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 71, 140, 142, 163, 284, 326, 355, 497, 652, 710, 815, 994, 1141, 1420, 1630, 1988, 2282, 2485, 3260, 4564, 4970, 5705, 9940, 11410, 11573, 22820, 23146, 46292, 57865, 81011, 115730, 162022, 231460, 324044, 405055, 810110, 1620220]

約数ペア:

[(1, 1620220), (2, 810110), (4, 405055), (5, 324044), (7, 231460), (10, 162022), (14, 115730), (20, 81011), (28, 57865), (35, 46292), (70, 23146), (71, 22820), (140, 11573), (142, 11410), (163, 9940), (284, 5705), (326, 4970), (355, 4564), (497, 3260), (652, 2485), (710, 2282), (815, 1988), (994, 1630), (1141, 1420)]