20859255

素因数分解:

$3^3\times 5^1\times {\mathrm{17}}^1\times {\mathrm{61}}^1\times {\mathrm{149}}^1$

素因数の和:241

約数の個数: 64

約数和(自身を含む): 40176000

約数和(自身を除く): 19316745

約数列:

[1, 3, 5, 9, 15, 17, 27, 45, 51, 61, 85, 135, 149, 153, 183, 255, 305, 447, 459, 549, 745, 765, 915, 1037, 1341, 1647, 2235, 2295, 2533, 2745, 3111, 4023, 5185, 6705, 7599, 8235, 9089, 9333, 12665, 15555, 20115, 22797, 27267, 27999, 37995, 45445, 46665, 68391, 81801, 113985, 136335, 139995, 154513, 245403, 341955, 409005, 463539, 772565, 1227015, 1390617, 2317695, 4171851, 6953085, 20859255]

約数ペア:

[(1, 20859255), (3, 6953085), (5, 4171851), (9, 2317695), (15, 1390617), (17, 1227015), (27, 772565), (45, 463539), (51, 409005), (61, 341955), (85, 245403), (135, 154513), (149, 139995), (153, 136335), (183, 113985), (255, 81801), (305, 68391), (447, 46665), (459, 45445), (549, 37995), (745, 27999), (765, 27267), (915, 22797), (1037, 20115), (1341, 15555), (1647, 12665), (2235, 9333), (2295, 9089), (2533, 8235), (2745, 7599), (3111, 6705), (4023, 5185)]