21557020

素因数分解:

$2^2\times 5^1\times {\mathrm{17}}^1\times {\mathrm{19}}^1\times {\mathrm{47}}^1\times {\mathrm{71}}^1$

素因数の和:163

約数の個数: 96

約数和(自身を含む): 52254720

約数和(自身を除く): 30697700

約数列:

[1, 2, 4, 5, 10, 17, 19, 20, 34, 38, 47, 68, 71, 76, 85, 94, 95, 142, 170, 188, 190, 235, 284, 323, 340, 355, 380, 470, 646, 710, 799, 893, 940, 1207, 1292, 1349, 1420, 1598, 1615, 1786, 2414, 2698, 3196, 3230, 3337, 3572, 3995, 4465, 4828, 5396, 6035, 6460, 6674, 6745, 7990, 8930, 12070, 13348, 13490, 15181, 15980, 16685, 17860, 22933, 24140, 26980, 30362, 33370, 45866, 56729, 60724, 63403, 66740, 75905, 91732, 113458, 114665, 126806, 151810, 226916, 229330, 253612, 283645, 303620, 317015, 458660, 567290, 634030, 1077851, 1134580, 1268060, 2155702, 4311404, 5389255, 10778510, 21557020]

約数ペア:

[(1, 21557020), (2, 10778510), (4, 5389255), (5, 4311404), (10, 2155702), (17, 1268060), (19, 1134580), (20, 1077851), (34, 634030), (38, 567290), (47, 458660), (68, 317015), (71, 303620), (76, 283645), (85, 253612), (94, 229330), (95, 226916), (142, 151810), (170, 126806), (188, 114665), (190, 113458), (235, 91732), (284, 75905), (323, 66740), (340, 63403), (355, 60724), (380, 56729), (470, 45866), (646, 33370), (710, 30362), (799, 26980), (893, 24140), (940, 22933), (1207, 17860), (1292, 16685), (1349, 15980), (1420, 15181), (1598, 13490), (1615, 13348), (1786, 12070), (2414, 8930), (2698, 7990), (3196, 6745), (3230, 6674), (3337, 6460), (3572, 6035), (3995, 5396), (4465, 4828)]