21078015

素因数分解:

$3^1\times 5^1\times 7^1\times {\mathrm{197}}^1\times {\mathrm{1019}}^1$

素因数の和:1231

約数の個数: 32

約数和(自身を含む): 38776320

約数和(自身を除く): 17698305

約数列:

[1, 3, 5, 7, 15, 21, 35, 105, 197, 591, 985, 1019, 1379, 2955, 3057, 4137, 5095, 6895, 7133, 15285, 20685, 21399, 35665, 106995, 200743, 602229, 1003715, 1405201, 3011145, 4215603, 7026005, 21078015]

約数ペア:

[(1, 21078015), (3, 7026005), (5, 4215603), (7, 3011145), (15, 1405201), (21, 1003715), (35, 602229), (105, 200743), (197, 106995), (591, 35665), (985, 21399), (1019, 20685), (1379, 15285), (2955, 7133), (3057, 6895), (4137, 5095)]