20989870

素因数分解:

$2^1\times 5^1\times {\mathrm{11}}^3\times {\mathrm{19}}^1\times {\mathrm{83}}^1$

素因数の和:142

約数の個数: 64

約数和(自身を含む): 44271360

約数和(自身を除く): 23281490

約数列:

[1, 2, 5, 10, 11, 19, 22, 38, 55, 83, 95, 110, 121, 166, 190, 209, 242, 415, 418, 605, 830, 913, 1045, 1210, 1331, 1577, 1826, 2090, 2299, 2662, 3154, 4565, 4598, 6655, 7885, 9130, 10043, 11495, 13310, 15770, 17347, 20086, 22990, 25289, 34694, 50215, 50578, 86735, 100430, 110473, 126445, 173470, 190817, 220946, 252890, 381634, 552365, 954085, 1104730, 1908170, 2098987, 4197974, 10494935, 20989870]

約数ペア:

[(1, 20989870), (2, 10494935), (5, 4197974), (10, 2098987), (11, 1908170), (19, 1104730), (22, 954085), (38, 552365), (55, 381634), (83, 252890), (95, 220946), (110, 190817), (121, 173470), (166, 126445), (190, 110473), (209, 100430), (242, 86735), (415, 50578), (418, 50215), (605, 34694), (830, 25289), (913, 22990), (1045, 20086), (1210, 17347), (1331, 15770), (1577, 13310), (1826, 11495), (2090, 10043), (2299, 9130), (2662, 7885), (3154, 6655), (4565, 4598)]