21628156

素因数分解:

$2^2\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{41}}^1\times {\mathrm{631}}^1$

素因数の和:706

約数の個数: 48

約数和(自身を含む): 44593920

約数和(自身を除く): 22965764

約数列:

[1, 2, 4, 11, 19, 22, 38, 41, 44, 76, 82, 164, 209, 418, 451, 631, 779, 836, 902, 1262, 1558, 1804, 2524, 3116, 6941, 8569, 11989, 13882, 17138, 23978, 25871, 27764, 34276, 47956, 51742, 103484, 131879, 263758, 284581, 491549, 527516, 569162, 983098, 1138324, 1966196, 5407039, 10814078, 21628156]

約数ペア:

[(1, 21628156), (2, 10814078), (4, 5407039), (11, 1966196), (19, 1138324), (22, 983098), (38, 569162), (41, 527516), (44, 491549), (76, 284581), (82, 263758), (164, 131879), (209, 103484), (418, 51742), (451, 47956), (631, 34276), (779, 27764), (836, 25871), (902, 23978), (1262, 17138), (1558, 13882), (1804, 11989), (2524, 8569), (3116, 6941)]