19747880

素因数分解:

$2^3\times 5^1\times {\mathrm{17}}^1\times {\mathrm{113}}^1\times {\mathrm{257}}^1$

素因数の和:398

約数の個数: 64

約数和(自身を含む): 47647440

約数和(自身を除く): 27899560

約数列:

[1, 2, 4, 5, 8, 10, 17, 20, 34, 40, 68, 85, 113, 136, 170, 226, 257, 340, 452, 514, 565, 680, 904, 1028, 1130, 1285, 1921, 2056, 2260, 2570, 3842, 4369, 4520, 5140, 7684, 8738, 9605, 10280, 15368, 17476, 19210, 21845, 29041, 34952, 38420, 43690, 58082, 76840, 87380, 116164, 145205, 174760, 232328, 290410, 493697, 580820, 987394, 1161640, 1974788, 2468485, 3949576, 4936970, 9873940, 19747880]

約数ペア:

[(1, 19747880), (2, 9873940), (4, 4936970), (5, 3949576), (8, 2468485), (10, 1974788), (17, 1161640), (20, 987394), (34, 580820), (40, 493697), (68, 290410), (85, 232328), (113, 174760), (136, 145205), (170, 116164), (226, 87380), (257, 76840), (340, 58082), (452, 43690), (514, 38420), (565, 34952), (680, 29041), (904, 21845), (1028, 19210), (1130, 17476), (1285, 15368), (1921, 10280), (2056, 9605), (2260, 8738), (2570, 7684), (3842, 5140), (4369, 4520)]