21347985

素因数分解:

$3^1\times 5^1\times {\mathrm{89}}^1\times {\mathrm{15991}}^1$

素因数の和:16088

約数の個数: 16

約数和(自身を含む): 34542720

約数和(自身を除く): 13194735

約数列:

[1, 3, 5, 15, 89, 267, 445, 1335, 15991, 47973, 79955, 239865, 1423199, 4269597, 7115995, 21347985]

約数ペア:

[(1, 21347985), (3, 7115995), (5, 4269597), (15, 1423199), (89, 239865), (267, 79955), (445, 47973), (1335, 15991)]