19878015

素因数分解:

$3^1\times 5^1\times {\mathrm{17}}^1\times {\mathrm{137}}^1\times {\mathrm{569}}^1$

素因数の和:731

約数の個数: 32

約数和(自身を含む): 33981120

約数和(自身を除く): 14103105

約数列:

[1, 3, 5, 15, 17, 51, 85, 137, 255, 411, 569, 685, 1707, 2055, 2329, 2845, 6987, 8535, 9673, 11645, 29019, 34935, 48365, 77953, 145095, 233859, 389765, 1169295, 1325201, 3975603, 6626005, 19878015]

約数ペア:

[(1, 19878015), (3, 6626005), (5, 3975603), (15, 1325201), (17, 1169295), (51, 389765), (85, 233859), (137, 145095), (255, 77953), (411, 48365), (569, 34935), (685, 29019), (1707, 11645), (2055, 9673), (2329, 8535), (2845, 6987)]