400677890

素因数分解:

$2^1\times 5^1\times {\mathrm{19}}^1\times {\mathrm{61}}^1\times {\mathrm{181}}^1\times {\mathrm{191}}^1$

素因数の和:459

約数の個数: 64

約数和(自身を含む): 779950080

約数和(自身を除く): 379272190

約数列:

[1, 2, 5, 10, 19, 38, 61, 95, 122, 181, 190, 191, 305, 362, 382, 610, 905, 955, 1159, 1810, 1910, 2318, 3439, 3629, 5795, 6878, 7258, 11041, 11590, 11651, 17195, 18145, 22082, 23302, 34390, 34571, 36290, 55205, 58255, 69142, 110410, 116510, 172855, 209779, 221369, 345710, 419558, 442738, 656849, 1048895, 1106845, 1313698, 2097790, 2108831, 2213690, 3284245, 4217662, 6568490, 10544155, 21088310, 40067789, 80135578, 200338945, 400677890]

約数ペア:

[(1, 400677890), (2, 200338945), (5, 80135578), (10, 40067789), (19, 21088310), (38, 10544155), (61, 6568490), (95, 4217662), (122, 3284245), (181, 2213690), (190, 2108831), (191, 2097790), (305, 1313698), (362, 1106845), (382, 1048895), (610, 656849), (905, 442738), (955, 419558), (1159, 345710), (1810, 221369), (1910, 209779), (2318, 172855), (3439, 116510), (3629, 110410), (5795, 69142), (6878, 58255), (7258, 55205), (11041, 36290), (11590, 34571), (11651, 34390), (17195, 23302), (18145, 22082)]