20856280

素因数分解:

$2^3\times 5^1\times {\mathrm{17}}^1\times {\mathrm{30671}}^1$

素因数の和:30699

約数の個数: 32

約数和(自身を含む): 49688640

約数和(自身を除く): 28832360

約数列:

[1, 2, 4, 5, 8, 10, 17, 20, 34, 40, 68, 85, 136, 170, 340, 680, 30671, 61342, 122684, 153355, 245368, 306710, 521407, 613420, 1042814, 1226840, 2085628, 2607035, 4171256, 5214070, 10428140, 20856280]

約数ペア:

[(1, 20856280), (2, 10428140), (4, 5214070), (5, 4171256), (8, 2607035), (10, 2085628), (17, 1226840), (20, 1042814), (34, 613420), (40, 521407), (68, 306710), (85, 245368), (136, 153355), (170, 122684), (340, 61342), (680, 30671)]