21781968

素因数分解:

$2^4\times 3^1\times {\mathrm{13}}^1\times {\mathrm{67}}^1\times {\mathrm{521}}^1$

素因数の和:612

約数の個数: 80

約数和(自身を含む): 61621056

約数和(自身を除く): 39839088

約数列:

[1, 2, 3, 4, 6, 8, 12, 13, 16, 24, 26, 39, 48, 52, 67, 78, 104, 134, 156, 201, 208, 268, 312, 402, 521, 536, 624, 804, 871, 1042, 1072, 1563, 1608, 1742, 2084, 2613, 3126, 3216, 3484, 4168, 5226, 6252, 6773, 6968, 8336, 10452, 12504, 13546, 13936, 20319, 20904, 25008, 27092, 34907, 40638, 41808, 54184, 69814, 81276, 104721, 108368, 139628, 162552, 209442, 279256, 325104, 418884, 453791, 558512, 837768, 907582, 1361373, 1675536, 1815164, 2722746, 3630328, 5445492, 7260656, 10890984, 21781968]

約数ペア:

[(1, 21781968), (2, 10890984), (3, 7260656), (4, 5445492), (6, 3630328), (8, 2722746), (12, 1815164), (13, 1675536), (16, 1361373), (24, 907582), (26, 837768), (39, 558512), (48, 453791), (52, 418884), (67, 325104), (78, 279256), (104, 209442), (134, 162552), (156, 139628), (201, 108368), (208, 104721), (268, 81276), (312, 69814), (402, 54184), (521, 41808), (536, 40638), (624, 34907), (804, 27092), (871, 25008), (1042, 20904), (1072, 20319), (1563, 13936), (1608, 13546), (1742, 12504), (2084, 10452), (2613, 8336), (3126, 6968), (3216, 6773), (3484, 6252), (4168, 5226)]