278743160

素因数分解:

$2^3\times 5^1\times {\mathrm{61}}^1\times {\mathrm{71}}^1\times {\mathrm{1609}}^1$

素因数の和:1752

約数の個数: 64

約数和(自身を含む): 646833600

約数和(自身を除く): 368090440

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 61, 71, 122, 142, 244, 284, 305, 355, 488, 568, 610, 710, 1220, 1420, 1609, 2440, 2840, 3218, 4331, 6436, 8045, 8662, 12872, 16090, 17324, 21655, 32180, 34648, 43310, 64360, 86620, 98149, 114239, 173240, 196298, 228478, 392596, 456956, 490745, 571195, 785192, 913912, 981490, 1142390, 1962980, 2284780, 3925960, 4569560, 6968579, 13937158, 27874316, 34842895, 55748632, 69685790, 139371580, 278743160]

約数ペア:

[(1, 278743160), (2, 139371580), (4, 69685790), (5, 55748632), (8, 34842895), (10, 27874316), (20, 13937158), (40, 6968579), (61, 4569560), (71, 3925960), (122, 2284780), (142, 1962980), (244, 1142390), (284, 981490), (305, 913912), (355, 785192), (488, 571195), (568, 490745), (610, 456956), (710, 392596), (1220, 228478), (1420, 196298), (1609, 173240), (2440, 114239), (2840, 98149), (3218, 86620), (4331, 64360), (6436, 43310), (8045, 34648), (8662, 32180), (12872, 21655), (16090, 17324)]