221420015

素因数分解:

$5^1\times {\mathrm{19}}^1\times {\mathrm{79}}^1\times {\mathrm{163}}^1\times {\mathrm{181}}^1$

素因数の和:447

約数の個数: 32

約数和(自身を含む): 286540800

約数和(自身を除く): 65120785

約数列:

[1, 5, 19, 79, 95, 163, 181, 395, 815, 905, 1501, 3097, 3439, 7505, 12877, 14299, 15485, 17195, 29503, 64385, 71495, 147515, 244663, 271681, 560557, 1223315, 1358405, 2330737, 2802785, 11653685, 44284003, 221420015]

約数ペア:

[(1, 221420015), (5, 44284003), (19, 11653685), (79, 2802785), (95, 2330737), (163, 1358405), (181, 1223315), (395, 560557), (815, 271681), (905, 244663), (1501, 147515), (3097, 71495), (3439, 64385), (7505, 29503), (12877, 17195), (14299, 15485)]