217408040

素因数分解:

$2^3\times 5^1\times {\mathrm{97}}^1\times {\mathrm{137}}^1\times {\mathrm{409}}^1$

素因数の和:654

約数の個数: 64

約数和(自身を含む): 499035600

約数和(自身を除く): 281627560

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 97, 137, 194, 274, 388, 409, 485, 548, 685, 776, 818, 970, 1096, 1370, 1636, 1940, 2045, 2740, 3272, 3880, 4090, 5480, 8180, 13289, 16360, 26578, 39673, 53156, 56033, 66445, 79346, 106312, 112066, 132890, 158692, 198365, 224132, 265780, 280165, 317384, 396730, 448264, 531560, 560330, 793460, 1120660, 1586920, 2241320, 5435201, 10870402, 21740804, 27176005, 43481608, 54352010, 108704020, 217408040]

約数ペア:

[(1, 217408040), (2, 108704020), (4, 54352010), (5, 43481608), (8, 27176005), (10, 21740804), (20, 10870402), (40, 5435201), (97, 2241320), (137, 1586920), (194, 1120660), (274, 793460), (388, 560330), (409, 531560), (485, 448264), (548, 396730), (685, 317384), (776, 280165), (818, 265780), (970, 224132), (1096, 198365), (1370, 158692), (1636, 132890), (1940, 112066), (2045, 106312), (2740, 79346), (3272, 66445), (3880, 56033), (4090, 53156), (5480, 39673), (8180, 26578), (13289, 16360)]