20278980

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{113}}^1\times {\mathrm{997}}^1$

素因数の和:1125

約数の個数: 72

約数和(自身を含む): 62119512

約数和(自身を除く): 41840532

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 30, 36, 45, 60, 90, 113, 180, 226, 339, 452, 565, 678, 997, 1017, 1130, 1356, 1695, 1994, 2034, 2260, 2991, 3390, 3988, 4068, 4985, 5085, 5982, 6780, 8973, 9970, 10170, 11964, 14955, 17946, 19940, 20340, 29910, 35892, 44865, 59820, 89730, 112661, 179460, 225322, 337983, 450644, 563305, 675966, 1013949, 1126610, 1351932, 1689915, 2027898, 2253220, 3379830, 4055796, 5069745, 6759660, 10139490, 20278980]

約数ペア:

[(1, 20278980), (2, 10139490), (3, 6759660), (4, 5069745), (5, 4055796), (6, 3379830), (9, 2253220), (10, 2027898), (12, 1689915), (15, 1351932), (18, 1126610), (20, 1013949), (30, 675966), (36, 563305), (45, 450644), (60, 337983), (90, 225322), (113, 179460), (180, 112661), (226, 89730), (339, 59820), (452, 44865), (565, 35892), (678, 29910), (997, 20340), (1017, 19940), (1130, 17946), (1356, 14955), (1695, 11964), (1994, 10170), (2034, 9970), (2260, 8973), (2991, 6780), (3390, 5982), (3988, 5085), (4068, 4985)]