2172820

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{61}}^1\times {\mathrm{137}}^1$

素因数の和:220

約数の個数: 48

約数和(自身を含む): 5030928

約数和(自身を除く): 2858108

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 61, 65, 122, 130, 137, 244, 260, 274, 305, 548, 610, 685, 793, 1220, 1370, 1586, 1781, 2740, 3172, 3562, 3965, 7124, 7930, 8357, 8905, 15860, 16714, 17810, 33428, 35620, 41785, 83570, 108641, 167140, 217282, 434564, 543205, 1086410, 2172820]

約数ペア:

[(1, 2172820), (2, 1086410), (4, 543205), (5, 434564), (10, 217282), (13, 167140), (20, 108641), (26, 83570), (52, 41785), (61, 35620), (65, 33428), (122, 17810), (130, 16714), (137, 15860), (244, 8905), (260, 8357), (274, 7930), (305, 7124), (548, 3965), (610, 3562), (685, 3172), (793, 2740), (1220, 1781), (1370, 1586)]