21499682788

素因数分解:

$2^2\times {\mathrm{19}}^2\times {\mathrm{29}}^1\times {\mathrm{691}}^1\times {\mathrm{743}}^1$

素因数の和:1505

約数の個数: 72

約数和(自身を含む): 41192988480

約数和(自身を除く): 19693305692

約数列:

[1, 2, 4, 19, 29, 38, 58, 76, 116, 361, 551, 691, 722, 743, 1102, 1382, 1444, 1486, 2204, 2764, 2972, 10469, 13129, 14117, 20039, 20938, 21547, 26258, 28234, 40078, 41876, 43094, 52516, 56468, 80156, 86188, 249451, 268223, 380741, 409393, 498902, 513413, 536446, 761482, 818786, 997804, 1026826, 1072892, 1522964, 1637572, 2053652, 7234079, 7778467, 9754847, 14468158, 14888977, 15556934, 19509694, 28936316, 29777954, 31113868, 39019388, 59555908, 185342093, 282890563, 370684186, 565781126, 741368372, 1131562252, 5374920697, 10749841394, 21499682788]

約数ペア:

[(1, 21499682788), (2, 10749841394), (4, 5374920697), (19, 1131562252), (29, 741368372), (38, 565781126), (58, 370684186), (76, 282890563), (116, 185342093), (361, 59555908), (551, 39019388), (691, 31113868), (722, 29777954), (743, 28936316), (1102, 19509694), (1382, 15556934), (1444, 14888977), (1486, 14468158), (2204, 9754847), (2764, 7778467), (2972, 7234079), (10469, 2053652), (13129, 1637572), (14117, 1522964), (20039, 1072892), (20938, 1026826), (21547, 997804), (26258, 818786), (28234, 761482), (40078, 536446), (41876, 513413), (43094, 498902), (52516, 409393), (56468, 380741), (80156, 268223), (86188, 249451)]