28191020

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{9857}}^1$

素因数の和:9890

約数の個数: 48

約数和(自身を含む): 69558048

約数和(自身を除く): 41367028

約数列:

[1, 2, 4, 5, 10, 11, 13, 20, 22, 26, 44, 52, 55, 65, 110, 130, 143, 220, 260, 286, 572, 715, 1430, 2860, 9857, 19714, 39428, 49285, 98570, 108427, 128141, 197140, 216854, 256282, 433708, 512564, 542135, 640705, 1084270, 1281410, 1409551, 2168540, 2562820, 2819102, 5638204, 7047755, 14095510, 28191020]

約数ペア:

[(1, 28191020), (2, 14095510), (4, 7047755), (5, 5638204), (10, 2819102), (11, 2562820), (13, 2168540), (20, 1409551), (22, 1281410), (26, 1084270), (44, 640705), (52, 542135), (55, 512564), (65, 433708), (110, 256282), (130, 216854), (143, 197140), (220, 128141), (260, 108427), (286, 98570), (572, 49285), (715, 39428), (1430, 19714), (2860, 9857)]