21817016

素因数分解:

$2^3\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{61}}^1\times {\mathrm{181}}^1$

素因数の和:280

約数の個数: 64

約数和(自身を含む): 47392800

約数和(自身を除く): 25575784

約数列:

[1, 2, 4, 8, 13, 19, 26, 38, 52, 61, 76, 104, 122, 152, 181, 244, 247, 362, 488, 494, 724, 793, 988, 1159, 1448, 1586, 1976, 2318, 2353, 3172, 3439, 4636, 4706, 6344, 6878, 9272, 9412, 11041, 13756, 15067, 18824, 22082, 27512, 30134, 44164, 44707, 60268, 88328, 89414, 120536, 143533, 178828, 209779, 287066, 357656, 419558, 574132, 839116, 1148264, 1678232, 2727127, 5454254, 10908508, 21817016]

約数ペア:

[(1, 21817016), (2, 10908508), (4, 5454254), (8, 2727127), (13, 1678232), (19, 1148264), (26, 839116), (38, 574132), (52, 419558), (61, 357656), (76, 287066), (104, 209779), (122, 178828), (152, 143533), (181, 120536), (244, 89414), (247, 88328), (362, 60268), (488, 44707), (494, 44164), (724, 30134), (793, 27512), (988, 22082), (1159, 18824), (1448, 15067), (1586, 13756), (1976, 11041), (2318, 9412), (2353, 9272), (3172, 6878), (3439, 6344), (4636, 4706)]