21026901

素因数分解:

$3^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{151}}^1\times {\mathrm{349}}^1$

素因数の和:529

約数の個数: 32

約数和(自身を含む): 34048000

約数和(自身を除く): 13021099

約数列:

[1, 3, 7, 19, 21, 57, 133, 151, 349, 399, 453, 1047, 1057, 2443, 2869, 3171, 6631, 7329, 8607, 19893, 20083, 46417, 52699, 60249, 139251, 158097, 368893, 1001281, 1106679, 3003843, 7008967, 21026901]

約数ペア:

[(1, 21026901), (3, 7008967), (7, 3003843), (19, 1106679), (21, 1001281), (57, 368893), (133, 158097), (151, 139251), (349, 60249), (399, 52699), (453, 46417), (1047, 20083), (1057, 19893), (2443, 8607), (2869, 7329), (3171, 6631)]