21577996

素因数分解:

$2^2\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{53}}^1\times {\mathrm{487}}^1$

素因数の和:574

約数の個数: 48

約数和(自身を含む): 44271360

約数和(自身を除く): 22693364

約数列:

[1, 2, 4, 11, 19, 22, 38, 44, 53, 76, 106, 209, 212, 418, 487, 583, 836, 974, 1007, 1166, 1948, 2014, 2332, 4028, 5357, 9253, 10714, 11077, 18506, 21428, 22154, 25811, 37012, 44308, 51622, 101783, 103244, 203566, 283921, 407132, 490409, 567842, 980818, 1135684, 1961636, 5394499, 10788998, 21577996]

約数ペア:

[(1, 21577996), (2, 10788998), (4, 5394499), (11, 1961636), (19, 1135684), (22, 980818), (38, 567842), (44, 490409), (53, 407132), (76, 283921), (106, 203566), (209, 103244), (212, 101783), (418, 51622), (487, 44308), (583, 37012), (836, 25811), (974, 22154), (1007, 21428), (1166, 18506), (1948, 11077), (2014, 10714), (2332, 9253), (4028, 5357)]