21228080

素因数分解:

$2^4\times 5^1\times {\mathrm{23}}^1\times {\mathrm{83}}^1\times {\mathrm{139}}^1$

素因数の和:258

約数の個数: 80

約数和(自身を含む): 52496640

約数和(自身を除く): 31268560

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 23, 40, 46, 80, 83, 92, 115, 139, 166, 184, 230, 278, 332, 368, 415, 460, 556, 664, 695, 830, 920, 1112, 1328, 1390, 1660, 1840, 1909, 2224, 2780, 3197, 3320, 3818, 5560, 6394, 6640, 7636, 9545, 11120, 11537, 12788, 15272, 15985, 19090, 23074, 25576, 30544, 31970, 38180, 46148, 51152, 57685, 63940, 76360, 92296, 115370, 127880, 152720, 184592, 230740, 255760, 265351, 461480, 530702, 922960, 1061404, 1326755, 2122808, 2653510, 4245616, 5307020, 10614040, 21228080]

約数ペア:

[(1, 21228080), (2, 10614040), (4, 5307020), (5, 4245616), (8, 2653510), (10, 2122808), (16, 1326755), (20, 1061404), (23, 922960), (40, 530702), (46, 461480), (80, 265351), (83, 255760), (92, 230740), (115, 184592), (139, 152720), (166, 127880), (184, 115370), (230, 92296), (278, 76360), (332, 63940), (368, 57685), (415, 51152), (460, 46148), (556, 38180), (664, 31970), (695, 30544), (830, 25576), (920, 23074), (1112, 19090), (1328, 15985), (1390, 15272), (1660, 12788), (1840, 11537), (1909, 11120), (2224, 9545), (2780, 7636), (3197, 6640), (3320, 6394), (3818, 5560)]