20458395

素因数分解:

$3^2\times 5^1\times {\mathrm{17}}^1\times {\mathrm{47}}^1\times {\mathrm{569}}^1$

素因数の和:644

約数の個数: 48

約数和(自身を含む): 38413440

約数和(自身を除く): 17955045

約数列:

[1, 3, 5, 9, 15, 17, 45, 47, 51, 85, 141, 153, 235, 255, 423, 569, 705, 765, 799, 1707, 2115, 2397, 2845, 3995, 5121, 7191, 8535, 9673, 11985, 25605, 26743, 29019, 35955, 48365, 80229, 87057, 133715, 145095, 240687, 401145, 435285, 454631, 1203435, 1363893, 2273155, 4091679, 6819465, 20458395]

約数ペア:

[(1, 20458395), (3, 6819465), (5, 4091679), (9, 2273155), (15, 1363893), (17, 1203435), (45, 454631), (47, 435285), (51, 401145), (85, 240687), (141, 145095), (153, 133715), (235, 87057), (255, 80229), (423, 48365), (569, 35955), (705, 29019), (765, 26743), (799, 25605), (1707, 11985), (2115, 9673), (2397, 8535), (2845, 7191), (3995, 5121)]