21015390

素因数分解:

$2^1\times 3^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{43}}^1\times {\mathrm{1481}}^1$

素因数の和:1545

約数の個数: 64

約数和(自身を含む): 56339712

約数和(自身を除く): 35324322

約数列:

[1, 2, 3, 5, 6, 10, 11, 15, 22, 30, 33, 43, 55, 66, 86, 110, 129, 165, 215, 258, 330, 430, 473, 645, 946, 1290, 1419, 1481, 2365, 2838, 2962, 4443, 4730, 7095, 7405, 8886, 14190, 14810, 16291, 22215, 32582, 44430, 48873, 63683, 81455, 97746, 127366, 162910, 191049, 244365, 318415, 382098, 488730, 636830, 700513, 955245, 1401026, 1910490, 2101539, 3502565, 4203078, 7005130, 10507695, 21015390]

約数ペア:

[(1, 21015390), (2, 10507695), (3, 7005130), (5, 4203078), (6, 3502565), (10, 2101539), (11, 1910490), (15, 1401026), (22, 955245), (30, 700513), (33, 636830), (43, 488730), (55, 382098), (66, 318415), (86, 244365), (110, 191049), (129, 162910), (165, 127366), (215, 97746), (258, 81455), (330, 63683), (430, 48873), (473, 44430), (645, 32582), (946, 22215), (1290, 16291), (1419, 14810), (1481, 14190), (2365, 8886), (2838, 7405), (2962, 7095), (4443, 4730)]