21253830

素因数分解:

$2^1\times 3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{54497}}^1$

素因数の和:54520

約数の個数: 32

約数和(自身を含む): 54933984

約数和(自身を除く): 33680154

約数列:

[1, 2, 3, 5, 6, 10, 13, 15, 26, 30, 39, 65, 78, 130, 195, 390, 54497, 108994, 163491, 272485, 326982, 544970, 708461, 817455, 1416922, 1634910, 2125383, 3542305, 4250766, 7084610, 10626915, 21253830]

約数ペア:

[(1, 21253830), (2, 10626915), (3, 7084610), (5, 4250766), (6, 3542305), (10, 2125383), (13, 1634910), (15, 1416922), (26, 817455), (30, 708461), (39, 544970), (65, 326982), (78, 272485), (130, 163491), (195, 108994), (390, 54497)]