21497415

素因数分解:

$3^1\times 5^1\times {\mathrm{31}}^1\times {\mathrm{83}}^1\times {\mathrm{557}}^1$

素因数の和:679

約数の個数: 32

約数和(自身を含む): 35997696

約数和(自身を除く): 14500281

約数列:

[1, 3, 5, 15, 31, 83, 93, 155, 249, 415, 465, 557, 1245, 1671, 2573, 2785, 7719, 8355, 12865, 17267, 38595, 46231, 51801, 86335, 138693, 231155, 259005, 693465, 1433161, 4299483, 7165805, 21497415]

約数ペア:

[(1, 21497415), (3, 7165805), (5, 4299483), (15, 1433161), (31, 693465), (83, 259005), (93, 231155), (155, 138693), (249, 86335), (415, 51801), (465, 46231), (557, 38595), (1245, 17267), (1671, 12865), (2573, 8355), (2785, 7719)]