21718216

素因数分解:

$2^3\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{29}}^1\times {\mathrm{379}}^1$

素因数の和:446

約数の個数: 64

約数和(自身を含む): 47880000

約数和(自身を除く): 26161784

約数列:

[1, 2, 4, 8, 13, 19, 26, 29, 38, 52, 58, 76, 104, 116, 152, 232, 247, 377, 379, 494, 551, 754, 758, 988, 1102, 1508, 1516, 1976, 2204, 3016, 3032, 4408, 4927, 7163, 7201, 9854, 10991, 14326, 14402, 19708, 21982, 28652, 28804, 39416, 43964, 57304, 57608, 87928, 93613, 142883, 187226, 208829, 285766, 374452, 417658, 571532, 748904, 835316, 1143064, 1670632, 2714777, 5429554, 10859108, 21718216]

約数ペア:

[(1, 21718216), (2, 10859108), (4, 5429554), (8, 2714777), (13, 1670632), (19, 1143064), (26, 835316), (29, 748904), (38, 571532), (52, 417658), (58, 374452), (76, 285766), (104, 208829), (116, 187226), (152, 142883), (232, 93613), (247, 87928), (377, 57608), (379, 57304), (494, 43964), (551, 39416), (754, 28804), (758, 28652), (988, 21982), (1102, 19708), (1508, 14402), (1516, 14326), (1976, 10991), (2204, 9854), (3016, 7201), (3032, 7163), (4408, 4927)]