989780180

素因数分解:

$2^2\times 5^1\times {\mathrm{41}}^1\times {\mathrm{149}}^1\times {\mathrm{8101}}^1$

素因数の和:8300

約数の個数: 48

約数和(自身を含む): 2143789200

約数和(自身を除く): 1154009020

約数列:

[1, 2, 4, 5, 10, 20, 41, 82, 149, 164, 205, 298, 410, 596, 745, 820, 1490, 2980, 6109, 8101, 12218, 16202, 24436, 30545, 32404, 40505, 61090, 81010, 122180, 162020, 332141, 664282, 1207049, 1328564, 1660705, 2414098, 3321410, 4828196, 6035245, 6642820, 12070490, 24140980, 49489009, 98978018, 197956036, 247445045, 494890090, 989780180]

約数ペア:

[(1, 989780180), (2, 494890090), (4, 247445045), (5, 197956036), (10, 98978018), (20, 49489009), (41, 24140980), (82, 12070490), (149, 6642820), (164, 6035245), (205, 4828196), (298, 3321410), (410, 2414098), (596, 1660705), (745, 1328564), (820, 1207049), (1490, 664282), (2980, 332141), (6109, 162020), (8101, 122180), (12218, 81010), (16202, 61090), (24436, 40505), (30545, 32404)]