20458750

素因数分解:

$2^1\times 5^4\times {\mathrm{13}}^1\times {\mathrm{1259}}^1$

素因数の和:1294

約数の個数: 40

約数和(自身を含む): 41330520

約数和(自身を除く): 20871770

約数列:

[1, 2, 5, 10, 13, 25, 26, 50, 65, 125, 130, 250, 325, 625, 650, 1250, 1259, 1625, 2518, 3250, 6295, 8125, 12590, 16250, 16367, 31475, 32734, 62950, 81835, 157375, 163670, 314750, 409175, 786875, 818350, 1573750, 2045875, 4091750, 10229375, 20458750]

約数ペア:

[(1, 20458750), (2, 10229375), (5, 4091750), (10, 2045875), (13, 1573750), (25, 818350), (26, 786875), (50, 409175), (65, 314750), (125, 163670), (130, 157375), (250, 81835), (325, 62950), (625, 32734), (650, 31475), (1250, 16367), (1259, 16250), (1625, 12590), (2518, 8125), (3250, 6295)]