21399885

素因数分解:

$3^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{157}}^1\times {\mathrm{233}}^1$

素因数の和:414

約数の個数: 48

約数和(自身を含む): 40373424

約数和(自身を除く): 18973539

約数列:

[1, 3, 5, 9, 13, 15, 39, 45, 65, 117, 157, 195, 233, 471, 585, 699, 785, 1165, 1413, 2041, 2097, 2355, 3029, 3495, 6123, 7065, 9087, 10205, 10485, 15145, 18369, 27261, 30615, 36581, 45435, 91845, 109743, 136305, 182905, 329229, 475553, 548715, 1426659, 1646145, 2377765, 4279977, 7133295, 21399885]

約数ペア:

[(1, 21399885), (3, 7133295), (5, 4279977), (9, 2377765), (13, 1646145), (15, 1426659), (39, 548715), (45, 475553), (65, 329229), (117, 182905), (157, 136305), (195, 109743), (233, 91845), (471, 45435), (585, 36581), (699, 30615), (785, 27261), (1165, 18369), (1413, 15145), (2041, 10485), (2097, 10205), (2355, 9087), (3029, 7065), (3495, 6123)]