20687520987

素因数分解:

$3^3\times 7^1\times {\mathrm{47}}^1\times {\mathrm{2328889}}^1$

素因数の和:2328952

約数の個数: 32

約数和(自身を含む): 35771750400

約数和(自身を除く): 15084229413

約数列:

[1, 3, 7, 9, 21, 27, 47, 63, 141, 189, 329, 423, 987, 1269, 2961, 8883, 2328889, 6986667, 16302223, 20960001, 48906669, 62880003, 109457783, 146720007, 328373349, 440160021, 766204481, 985120047, 2298613443, 2955360141, 6895840329, 20687520987]

約数ペア:

[(1, 20687520987), (3, 6895840329), (7, 2955360141), (9, 2298613443), (21, 985120047), (27, 766204481), (47, 440160021), (63, 328373349), (141, 146720007), (189, 109457783), (329, 62880003), (423, 48906669), (987, 20960001), (1269, 16302223), (2961, 6986667), (8883, 2328889)]