21286804

素因数分解:

$2^2\times 7^1\times {\mathrm{11}}^2\times {\mathrm{61}}^1\times {\mathrm{103}}^1$

素因数の和:197

約数の個数: 72

約数和(自身を含む): 48024704

約数和(自身を除く): 26737900

約数列:

[1, 2, 4, 7, 11, 14, 22, 28, 44, 61, 77, 103, 121, 122, 154, 206, 242, 244, 308, 412, 427, 484, 671, 721, 847, 854, 1133, 1342, 1442, 1694, 1708, 2266, 2684, 2884, 3388, 4532, 4697, 6283, 7381, 7931, 9394, 12463, 12566, 14762, 15862, 18788, 24926, 25132, 29524, 31724, 43981, 49852, 51667, 69113, 87241, 87962, 103334, 138226, 174482, 175924, 206668, 276452, 348964, 483791, 760243, 967582, 1520486, 1935164, 3040972, 5321701, 10643402, 21286804]

約数ペア:

[(1, 21286804), (2, 10643402), (4, 5321701), (7, 3040972), (11, 1935164), (14, 1520486), (22, 967582), (28, 760243), (44, 483791), (61, 348964), (77, 276452), (103, 206668), (121, 175924), (122, 174482), (154, 138226), (206, 103334), (242, 87962), (244, 87241), (308, 69113), (412, 51667), (427, 49852), (484, 43981), (671, 31724), (721, 29524), (847, 25132), (854, 24926), (1133, 18788), (1342, 15862), (1442, 14762), (1694, 12566), (1708, 12463), (2266, 9394), (2684, 7931), (2884, 7381), (3388, 6283), (4532, 4697)]