20967640

素因数分解:

$2^3\times 5^1\times {\mathrm{19}}^1\times {\mathrm{47}}^1\times {\mathrm{587}}^1$

素因数の和:664

約数の個数: 64

約数和(自身を含む): 50803200

約数和(自身を除く): 29835560

約数列:

[1, 2, 4, 5, 8, 10, 19, 20, 38, 40, 47, 76, 94, 95, 152, 188, 190, 235, 376, 380, 470, 587, 760, 893, 940, 1174, 1786, 1880, 2348, 2935, 3572, 4465, 4696, 5870, 7144, 8930, 11153, 11740, 17860, 22306, 23480, 27589, 35720, 44612, 55178, 55765, 89224, 110356, 111530, 137945, 220712, 223060, 275890, 446120, 524191, 551780, 1048382, 1103560, 2096764, 2620955, 4193528, 5241910, 10483820, 20967640]

約数ペア:

[(1, 20967640), (2, 10483820), (4, 5241910), (5, 4193528), (8, 2620955), (10, 2096764), (19, 1103560), (20, 1048382), (38, 551780), (40, 524191), (47, 446120), (76, 275890), (94, 223060), (95, 220712), (152, 137945), (188, 111530), (190, 110356), (235, 89224), (376, 55765), (380, 55178), (470, 44612), (587, 35720), (760, 27589), (893, 23480), (940, 22306), (1174, 17860), (1786, 11740), (1880, 11153), (2348, 8930), (2935, 7144), (3572, 5870), (4465, 4696)]