21518835

素因数分解:

$3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{211}}^1\times {\mathrm{523}}^1$

素因数の和:755

約数の個数: 32

約数和(自身を含む): 37325568

約数和(自身を除く): 15806733

約数列:

[1, 3, 5, 13, 15, 39, 65, 195, 211, 523, 633, 1055, 1569, 2615, 2743, 3165, 6799, 7845, 8229, 13715, 20397, 33995, 41145, 101985, 110353, 331059, 551765, 1434589, 1655295, 4303767, 7172945, 21518835]

約数ペア:

[(1, 21518835), (3, 7172945), (5, 4303767), (13, 1655295), (15, 1434589), (39, 551765), (65, 331059), (195, 110353), (211, 101985), (523, 41145), (633, 33995), (1055, 20397), (1569, 13715), (2615, 8229), (2743, 7845), (3165, 6799)]