19618820

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{61}}^1\times {\mathrm{1237}}^1$

素因数の和:1320

約数の個数: 48

約数和(自身を含む): 45132528

約数和(自身を除く): 25513708

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 61, 65, 122, 130, 244, 260, 305, 610, 793, 1220, 1237, 1586, 2474, 3172, 3965, 4948, 6185, 7930, 12370, 15860, 16081, 24740, 32162, 64324, 75457, 80405, 150914, 160810, 301828, 321620, 377285, 754570, 980941, 1509140, 1961882, 3923764, 4904705, 9809410, 19618820]

約数ペア:

[(1, 19618820), (2, 9809410), (4, 4904705), (5, 3923764), (10, 1961882), (13, 1509140), (20, 980941), (26, 754570), (52, 377285), (61, 321620), (65, 301828), (122, 160810), (130, 150914), (244, 80405), (260, 75457), (305, 64324), (610, 32162), (793, 24740), (1220, 16081), (1237, 15860), (1586, 12370), (2474, 7930), (3172, 6185), (3965, 4948)]