20215173875

素因数分解:

$5^3\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{53}}^1\times {\mathrm{13807}}^1$

素因数の和:13905

約数の個数: 64

約数和(自身を含む): 29312285184

約数和(自身を除く): 9097111309

約数列:

[1, 5, 13, 17, 25, 53, 65, 85, 125, 221, 265, 325, 425, 689, 901, 1105, 1325, 1625, 2125, 3445, 4505, 5525, 6625, 11713, 13807, 17225, 22525, 27625, 58565, 69035, 86125, 112625, 179491, 234719, 292825, 345175, 731771, 897455, 1173595, 1464125, 1725875, 3051347, 3658855, 4487275, 5867975, 9513023, 12440107, 15256735, 18294275, 22436375, 29339875, 47565115, 62200535, 76283675, 91471375, 161721391, 237825575, 311002675, 381418375, 808606955, 1189127875, 1555013375, 4043034775, 20215173875]

約数ペア:

[(1, 20215173875), (5, 4043034775), (13, 1555013375), (17, 1189127875), (25, 808606955), (53, 381418375), (65, 311002675), (85, 237825575), (125, 161721391), (221, 91471375), (265, 76283675), (325, 62200535), (425, 47565115), (689, 29339875), (901, 22436375), (1105, 18294275), (1325, 15256735), (1625, 12440107), (2125, 9513023), (3445, 5867975), (4505, 4487275), (5525, 3658855), (6625, 3051347), (11713, 1725875), (13807, 1464125), (17225, 1173595), (22525, 897455), (27625, 731771), (58565, 345175), (69035, 292825), (86125, 234719), (112625, 179491)]