21537640

素因数分解:

$2^3\times 5^1\times {\mathrm{17}}^1\times {\mathrm{19}}^1\times {\mathrm{1667}}^1$

素因数の和:1714

約数の個数: 64

約数和(自身を含む): 54043200

約数和(自身を除く): 32505560

約数列:

[1, 2, 4, 5, 8, 10, 17, 19, 20, 34, 38, 40, 68, 76, 85, 95, 136, 152, 170, 190, 323, 340, 380, 646, 680, 760, 1292, 1615, 1667, 2584, 3230, 3334, 6460, 6668, 8335, 12920, 13336, 16670, 28339, 31673, 33340, 56678, 63346, 66680, 113356, 126692, 141695, 158365, 226712, 253384, 283390, 316730, 538441, 566780, 633460, 1076882, 1133560, 1266920, 2153764, 2692205, 4307528, 5384410, 10768820, 21537640]

約数ペア:

[(1, 21537640), (2, 10768820), (4, 5384410), (5, 4307528), (8, 2692205), (10, 2153764), (17, 1266920), (19, 1133560), (20, 1076882), (34, 633460), (38, 566780), (40, 538441), (68, 316730), (76, 283390), (85, 253384), (95, 226712), (136, 158365), (152, 141695), (170, 126692), (190, 113356), (323, 66680), (340, 63346), (380, 56678), (646, 33340), (680, 31673), (760, 28339), (1292, 16670), (1615, 13336), (1667, 12920), (2584, 8335), (3230, 6668), (3334, 6460)]