21553805

素因数分解:

$5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{127}}^1\times {\mathrm{373}}^1$

素因数の和:525

約数の個数: 32

約数和(自身を含む): 32169984

約数和(自身を除く): 10616179

約数列:

[1, 5, 7, 13, 35, 65, 91, 127, 373, 455, 635, 889, 1651, 1865, 2611, 4445, 4849, 8255, 11557, 13055, 24245, 33943, 47371, 57785, 169715, 236855, 331597, 615823, 1657985, 3079115, 4310761, 21553805]

約数ペア:

[(1, 21553805), (5, 4310761), (7, 3079115), (13, 1657985), (35, 615823), (65, 331597), (91, 236855), (127, 169715), (373, 57785), (455, 47371), (635, 33943), (889, 24245), (1651, 13055), (1865, 11557), (2611, 8255), (4445, 4849)]