21105702911

素因数分解:

${\mathrm{19}}^2\times {\mathrm{23}}^2\times {\mathrm{29}}^1\times {\mathrm{37}}^1\times {\mathrm{103}}^1$

素因数の和:253

約数の個数: 72

約数和(自身を含む): 24979762080

約数和(自身を除く): 3874059169

約数列:

[1, 19, 23, 29, 37, 103, 361, 437, 529, 551, 667, 703, 851, 1073, 1957, 2369, 2987, 3811, 8303, 10051, 10469, 12673, 13357, 15341, 16169, 19573, 20387, 24679, 37183, 45011, 54487, 56753, 68701, 72409, 87653, 110519, 190969, 240787, 291479, 307211, 371887, 387353, 468901, 567617, 855209, 1035253, 1078307, 1305319, 1375771, 1580123, 1665407, 2016019, 2099861, 2541937, 5538101, 7065853, 8909119, 10784723, 19669807, 24801061, 30022337, 31642733, 38304361, 39897359, 48296803, 58464551, 204909737, 570424403, 727782859, 917639257, 1110826469, 21105702911]

約数ペア:

[(1, 21105702911), (19, 1110826469), (23, 917639257), (29, 727782859), (37, 570424403), (103, 204909737), (361, 58464551), (437, 48296803), (529, 39897359), (551, 38304361), (667, 31642733), (703, 30022337), (851, 24801061), (1073, 19669807), (1957, 10784723), (2369, 8909119), (2987, 7065853), (3811, 5538101), (8303, 2541937), (10051, 2099861), (10469, 2016019), (12673, 1665407), (13357, 1580123), (15341, 1375771), (16169, 1305319), (19573, 1078307), (20387, 1035253), (24679, 855209), (37183, 567617), (45011, 468901), (54487, 387353), (56753, 371887), (68701, 307211), (72409, 291479), (87653, 240787), (110519, 190969)]