21528468

素因数分解:

$2^2\times 3^2\times {\mathrm{13}}^1\times {\mathrm{157}}^1\times {\mathrm{293}}^1$

素因数の和:473

約数の個数: 72

約数和(自身を含む): 59179848

約数和(自身を除く): 37651380

約数列:

[1, 2, 3, 4, 6, 9, 12, 13, 18, 26, 36, 39, 52, 78, 117, 156, 157, 234, 293, 314, 468, 471, 586, 628, 879, 942, 1172, 1413, 1758, 1884, 2041, 2637, 2826, 3516, 3809, 4082, 5274, 5652, 6123, 7618, 8164, 10548, 11427, 12246, 15236, 18369, 22854, 24492, 34281, 36738, 45708, 46001, 68562, 73476, 92002, 137124, 138003, 184004, 276006, 414009, 552012, 598013, 828018, 1196026, 1656036, 1794039, 2392052, 3588078, 5382117, 7176156, 10764234, 21528468]

約数ペア:

[(1, 21528468), (2, 10764234), (3, 7176156), (4, 5382117), (6, 3588078), (9, 2392052), (12, 1794039), (13, 1656036), (18, 1196026), (26, 828018), (36, 598013), (39, 552012), (52, 414009), (78, 276006), (117, 184004), (156, 138003), (157, 137124), (234, 92002), (293, 73476), (314, 68562), (468, 46001), (471, 45708), (586, 36738), (628, 34281), (879, 24492), (942, 22854), (1172, 18369), (1413, 15236), (1758, 12246), (1884, 11427), (2041, 10548), (2637, 8164), (2826, 7618), (3516, 6123), (3809, 5652), (4082, 5274)]