19806990

素因数分解:

$2^1\times 3^1\times 5^1\times 7^1\times {\mathrm{257}}^1\times {\mathrm{367}}^1$

素因数の和:641

約数の個数: 64

約数和(自身を含む): 54687744

約数和(自身を除く): 34880754

約数列:

[1, 2, 3, 5, 6, 7, 10, 14, 15, 21, 30, 35, 42, 70, 105, 210, 257, 367, 514, 734, 771, 1101, 1285, 1542, 1799, 1835, 2202, 2569, 2570, 3598, 3670, 3855, 5138, 5397, 5505, 7707, 7710, 8995, 10794, 11010, 12845, 15414, 17990, 25690, 26985, 38535, 53970, 77070, 94319, 188638, 282957, 471595, 565914, 660233, 943190, 1320466, 1414785, 1980699, 2829570, 3301165, 3961398, 6602330, 9903495, 19806990]

約数ペア:

[(1, 19806990), (2, 9903495), (3, 6602330), (5, 3961398), (6, 3301165), (7, 2829570), (10, 1980699), (14, 1414785), (15, 1320466), (21, 943190), (30, 660233), (35, 565914), (42, 471595), (70, 282957), (105, 188638), (210, 94319), (257, 77070), (367, 53970), (514, 38535), (734, 26985), (771, 25690), (1101, 17990), (1285, 15414), (1542, 12845), (1799, 11010), (1835, 10794), (2202, 8995), (2569, 7710), (2570, 7707), (3598, 5505), (3670, 5397), (3855, 5138)]