19904950

素因数分解:

$2^1\times 5^2\times {\mathrm{13}}^1\times {\mathrm{113}}^1\times {\mathrm{271}}^1$

素因数の和:409

約数の個数: 48

約数和(自身を含む): 40372416

約数和(自身を除く): 20467466

約数列:

[1, 2, 5, 10, 13, 25, 26, 50, 65, 113, 130, 226, 271, 325, 542, 565, 650, 1130, 1355, 1469, 2710, 2825, 2938, 3523, 5650, 6775, 7046, 7345, 13550, 14690, 17615, 30623, 35230, 36725, 61246, 73450, 88075, 153115, 176150, 306230, 398099, 765575, 796198, 1531150, 1990495, 3980990, 9952475, 19904950]

約数ペア:

[(1, 19904950), (2, 9952475), (5, 3980990), (10, 1990495), (13, 1531150), (25, 796198), (26, 765575), (50, 398099), (65, 306230), (113, 176150), (130, 153115), (226, 88075), (271, 73450), (325, 61246), (542, 36725), (565, 35230), (650, 30623), (1130, 17615), (1355, 14690), (1469, 13550), (2710, 7345), (2825, 7046), (2938, 6775), (3523, 5650)]