21288740

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^2\times {\mathrm{19}}^1\times {\mathrm{463}}^1$

素因数の和:513

約数の個数: 72

約数和(自身を含む): 51838080

約数和(自身を除く): 30549340

約数列:

[1, 2, 4, 5, 10, 11, 19, 20, 22, 38, 44, 55, 76, 95, 110, 121, 190, 209, 220, 242, 380, 418, 463, 484, 605, 836, 926, 1045, 1210, 1852, 2090, 2299, 2315, 2420, 4180, 4598, 4630, 5093, 8797, 9196, 9260, 10186, 11495, 17594, 20372, 22990, 25465, 35188, 43985, 45980, 50930, 56023, 87970, 96767, 101860, 112046, 175940, 193534, 224092, 280115, 387068, 483835, 560230, 967670, 1064437, 1120460, 1935340, 2128874, 4257748, 5322185, 10644370, 21288740]

約数ペア:

[(1, 21288740), (2, 10644370), (4, 5322185), (5, 4257748), (10, 2128874), (11, 1935340), (19, 1120460), (20, 1064437), (22, 967670), (38, 560230), (44, 483835), (55, 387068), (76, 280115), (95, 224092), (110, 193534), (121, 175940), (190, 112046), (209, 101860), (220, 96767), (242, 87970), (380, 56023), (418, 50930), (463, 45980), (484, 43985), (605, 35188), (836, 25465), (926, 22990), (1045, 20372), (1210, 17594), (1852, 11495), (2090, 10186), (2299, 9260), (2315, 9196), (2420, 8797), (4180, 5093), (4598, 4630)]