21235720

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{17}}^2\times {\mathrm{167}}^1$

素因数の和:223

約数の個数: 96

約数和(自身を含む): 55702080

約数和(自身を除く): 34466360

約数列:

[1, 2, 4, 5, 8, 10, 11, 17, 20, 22, 34, 40, 44, 55, 68, 85, 88, 110, 136, 167, 170, 187, 220, 289, 334, 340, 374, 440, 578, 668, 680, 748, 835, 935, 1156, 1336, 1445, 1496, 1670, 1837, 1870, 2312, 2839, 2890, 3179, 3340, 3674, 3740, 5678, 5780, 6358, 6680, 7348, 7480, 9185, 11356, 11560, 12716, 14195, 14696, 15895, 18370, 22712, 25432, 28390, 31229, 31790, 36740, 48263, 56780, 62458, 63580, 73480, 96526, 113560, 124916, 127160, 156145, 193052, 241315, 249832, 312290, 386104, 482630, 530893, 624580, 965260, 1061786, 1249160, 1930520, 2123572, 2654465, 4247144, 5308930, 10617860, 21235720]

約数ペア:

[(1, 21235720), (2, 10617860), (4, 5308930), (5, 4247144), (8, 2654465), (10, 2123572), (11, 1930520), (17, 1249160), (20, 1061786), (22, 965260), (34, 624580), (40, 530893), (44, 482630), (55, 386104), (68, 312290), (85, 249832), (88, 241315), (110, 193052), (136, 156145), (167, 127160), (170, 124916), (187, 113560), (220, 96526), (289, 73480), (334, 63580), (340, 62458), (374, 56780), (440, 48263), (578, 36740), (668, 31790), (680, 31229), (748, 28390), (835, 25432), (935, 22712), (1156, 18370), (1336, 15895), (1445, 14696), (1496, 14195), (1670, 12716), (1837, 11560), (1870, 11356), (2312, 9185), (2839, 7480), (2890, 7348), (3179, 6680), (3340, 6358), (3674, 5780), (3740, 5678)]