21017390

素因数分解:

$2^1\times 5^1\times {\mathrm{1303}}^1\times {\mathrm{1613}}^1$

素因数の和:2923

約数の個数: 16

約数和(自身を含む): 37883808

約数和(自身を除く): 16866418

約数列:

[1, 2, 5, 10, 1303, 1613, 2606, 3226, 6515, 8065, 13030, 16130, 2101739, 4203478, 10508695, 21017390]

約数ペア:

[(1, 21017390), (2, 10508695), (5, 4203478), (10, 2101739), (1303, 16130), (1613, 13030), (2606, 8065), (3226, 6515)]