21128608

素因数分解:

$2^5\times {\mathrm{19}}^2\times {\mathrm{31}}^1\times {\mathrm{59}}^1$

素因数の和:138

約数の個数: 72

約数和(自身を含む): 46085760

約数和(自身を除く): 24957152

約数列:

[1, 2, 4, 8, 16, 19, 31, 32, 38, 59, 62, 76, 118, 124, 152, 236, 248, 304, 361, 472, 496, 589, 608, 722, 944, 992, 1121, 1178, 1444, 1829, 1888, 2242, 2356, 2888, 3658, 4484, 4712, 5776, 7316, 8968, 9424, 11191, 11552, 14632, 17936, 18848, 21299, 22382, 29264, 34751, 35872, 42598, 44764, 58528, 69502, 85196, 89528, 139004, 170392, 179056, 278008, 340784, 358112, 556016, 660269, 681568, 1112032, 1320538, 2641076, 5282152, 10564304, 21128608]

約数ペア:

[(1, 21128608), (2, 10564304), (4, 5282152), (8, 2641076), (16, 1320538), (19, 1112032), (31, 681568), (32, 660269), (38, 556016), (59, 358112), (62, 340784), (76, 278008), (118, 179056), (124, 170392), (152, 139004), (236, 89528), (248, 85196), (304, 69502), (361, 58528), (472, 44764), (496, 42598), (589, 35872), (608, 34751), (722, 29264), (944, 22382), (992, 21299), (1121, 18848), (1178, 17936), (1444, 14632), (1829, 11552), (1888, 11191), (2242, 9424), (2356, 8968), (2888, 7316), (3658, 5776), (4484, 4712)]