20907015

素因数分解:

$3^1\times 5^1\times {\mathrm{67}}^1\times {\mathrm{71}}^1\times {\mathrm{293}}^1$

素因数の和:439

約数の個数: 32

約数和(自身を含む): 34546176

約数和(自身を除く): 13639161

約数列:

[1, 3, 5, 15, 67, 71, 201, 213, 293, 335, 355, 879, 1005, 1065, 1465, 4395, 4757, 14271, 19631, 20803, 23785, 58893, 62409, 71355, 98155, 104015, 294465, 312045, 1393801, 4181403, 6969005, 20907015]

約数ペア:

[(1, 20907015), (3, 6969005), (5, 4181403), (15, 1393801), (67, 312045), (71, 294465), (201, 104015), (213, 98155), (293, 71355), (335, 62409), (355, 58893), (879, 23785), (1005, 20803), (1065, 19631), (1465, 14271), (4395, 4757)]