28130920

素因数分解:

$2^3\times 5^1\times {\mathrm{17}}^1\times {\mathrm{41}}^1\times {\mathrm{1009}}^1$

素因数の和:1078

約数の個数: 64

約数和(自身を含む): 68720400

約数和(自身を除く): 40589480

約数列:

[1, 2, 4, 5, 8, 10, 17, 20, 34, 40, 41, 68, 82, 85, 136, 164, 170, 205, 328, 340, 410, 680, 697, 820, 1009, 1394, 1640, 2018, 2788, 3485, 4036, 5045, 5576, 6970, 8072, 10090, 13940, 17153, 20180, 27880, 34306, 40360, 41369, 68612, 82738, 85765, 137224, 165476, 171530, 206845, 330952, 343060, 413690, 686120, 703273, 827380, 1406546, 1654760, 2813092, 3516365, 5626184, 7032730, 14065460, 28130920]

約数ペア:

[(1, 28130920), (2, 14065460), (4, 7032730), (5, 5626184), (8, 3516365), (10, 2813092), (17, 1654760), (20, 1406546), (34, 827380), (40, 703273), (41, 686120), (68, 413690), (82, 343060), (85, 330952), (136, 206845), (164, 171530), (170, 165476), (205, 137224), (328, 85765), (340, 82738), (410, 68612), (680, 41369), (697, 40360), (820, 34306), (1009, 27880), (1394, 20180), (1640, 17153), (2018, 13940), (2788, 10090), (3485, 8072), (4036, 6970), (5045, 5576)]