21990930

素因数分解:

$2^1\times 3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{113}}^1\times {\mathrm{499}}^1$

素因数の和:635

約数の個数: 64

約数和(自身を含む): 57456000

約数和(自身を除く): 35465070

約数列:

[1, 2, 3, 5, 6, 10, 13, 15, 26, 30, 39, 65, 78, 113, 130, 195, 226, 339, 390, 499, 565, 678, 998, 1130, 1469, 1497, 1695, 2495, 2938, 2994, 3390, 4407, 4990, 6487, 7345, 7485, 8814, 12974, 14690, 14970, 19461, 22035, 32435, 38922, 44070, 56387, 64870, 97305, 112774, 169161, 194610, 281935, 338322, 563870, 733031, 845805, 1466062, 1691610, 2199093, 3665155, 4398186, 7330310, 10995465, 21990930]

約数ペア:

[(1, 21990930), (2, 10995465), (3, 7330310), (5, 4398186), (6, 3665155), (10, 2199093), (13, 1691610), (15, 1466062), (26, 845805), (30, 733031), (39, 563870), (65, 338322), (78, 281935), (113, 194610), (130, 169161), (195, 112774), (226, 97305), (339, 64870), (390, 56387), (499, 44070), (565, 38922), (678, 32435), (998, 22035), (1130, 19461), (1469, 14970), (1497, 14690), (1695, 12974), (2495, 8814), (2938, 7485), (2994, 7345), (3390, 6487), (4407, 4990)]