20078289

素因数分解:

$3^2\times 7^2\times {\mathrm{11}}^1\times {\mathrm{4139}}^1$

素因数の和:4170

約数の個数: 36

約数和(自身を含む): 36812880

約数和(自身を除く): 16734591

約数列:

[1, 3, 7, 9, 11, 21, 33, 49, 63, 77, 99, 147, 231, 441, 539, 693, 1617, 4139, 4851, 12417, 28973, 37251, 45529, 86919, 136587, 202811, 260757, 318703, 409761, 608433, 956109, 1825299, 2230921, 2868327, 6692763, 20078289]

約数ペア:

[(1, 20078289), (3, 6692763), (7, 2868327), (9, 2230921), (11, 1825299), (21, 956109), (33, 608433), (49, 409761), (63, 318703), (77, 260757), (99, 202811), (147, 136587), (231, 86919), (441, 45529), (539, 37251), (693, 28973), (1617, 12417), (4139, 4851)]