21506020

素因数分解:

$2^2\times 5^1\times {\mathrm{17}}^1\times {\mathrm{43}}^1\times {\mathrm{1471}}^1$

素因数の和:1540

約数の個数: 48

約数和(自身を含む): 48964608

約数和(自身を除く): 27458588

約数列:

[1, 2, 4, 5, 10, 17, 20, 34, 43, 68, 85, 86, 170, 172, 215, 340, 430, 731, 860, 1462, 1471, 2924, 2942, 3655, 5884, 7310, 7355, 14620, 14710, 25007, 29420, 50014, 63253, 100028, 125035, 126506, 250070, 253012, 316265, 500140, 632530, 1075301, 1265060, 2150602, 4301204, 5376505, 10753010, 21506020]

約数ペア:

[(1, 21506020), (2, 10753010), (4, 5376505), (5, 4301204), (10, 2150602), (17, 1265060), (20, 1075301), (34, 632530), (43, 500140), (68, 316265), (85, 253012), (86, 250070), (170, 126506), (172, 125035), (215, 100028), (340, 63253), (430, 50014), (731, 29420), (860, 25007), (1462, 14710), (1471, 14620), (2924, 7355), (2942, 7310), (3655, 5884)]