21208890

素因数分解:

$2^1\times 3^1\times 5^1\times {\mathrm{41}}^1\times {\mathrm{43}}^1\times {\mathrm{401}}^1$

素因数の和:495

約数の個数: 64

約数和(自身を含む): 53488512

約数和(自身を除く): 32279622

約数列:

[1, 2, 3, 5, 6, 10, 15, 30, 41, 43, 82, 86, 123, 129, 205, 215, 246, 258, 401, 410, 430, 615, 645, 802, 1203, 1230, 1290, 1763, 2005, 2406, 3526, 4010, 5289, 6015, 8815, 10578, 12030, 16441, 17243, 17630, 26445, 32882, 34486, 49323, 51729, 52890, 82205, 86215, 98646, 103458, 164410, 172430, 246615, 258645, 493230, 517290, 706963, 1413926, 2120889, 3534815, 4241778, 7069630, 10604445, 21208890]

約数ペア:

[(1, 21208890), (2, 10604445), (3, 7069630), (5, 4241778), (6, 3534815), (10, 2120889), (15, 1413926), (30, 706963), (41, 517290), (43, 493230), (82, 258645), (86, 246615), (123, 172430), (129, 164410), (205, 103458), (215, 98646), (246, 86215), (258, 82205), (401, 52890), (410, 51729), (430, 49323), (615, 34486), (645, 32882), (802, 26445), (1203, 17630), (1230, 17243), (1290, 16441), (1763, 12030), (2005, 10578), (2406, 8815), (3526, 6015), (4010, 5289)]