21919688

素因数分解:

$2^3\times 7^1\times {\mathrm{37}}^1\times {\mathrm{71}}^1\times {\mathrm{149}}^1$

素因数の和:270

約数の個数: 64

約数和(自身を含む): 49248000

約数和(自身を除く): 27328312

約数列:

[1, 2, 4, 7, 8, 14, 28, 37, 56, 71, 74, 142, 148, 149, 259, 284, 296, 298, 497, 518, 568, 596, 994, 1036, 1043, 1192, 1988, 2072, 2086, 2627, 3976, 4172, 5254, 5513, 8344, 10508, 10579, 11026, 18389, 21016, 21158, 22052, 36778, 38591, 42316, 44104, 73556, 74053, 77182, 84632, 147112, 148106, 154364, 296212, 308728, 391423, 592424, 782846, 1565692, 2739961, 3131384, 5479922, 10959844, 21919688]

約数ペア:

[(1, 21919688), (2, 10959844), (4, 5479922), (7, 3131384), (8, 2739961), (14, 1565692), (28, 782846), (37, 592424), (56, 391423), (71, 308728), (74, 296212), (142, 154364), (148, 148106), (149, 147112), (259, 84632), (284, 77182), (296, 74053), (298, 73556), (497, 44104), (518, 42316), (568, 38591), (596, 36778), (994, 22052), (1036, 21158), (1043, 21016), (1192, 18389), (1988, 11026), (2072, 10579), (2086, 10508), (2627, 8344), (3976, 5513), (4172, 5254)]