81578835

素因数分解:

$3^2\times 5^1\times {\mathrm{13}}^2\times {\mathrm{17}}^1\times {\mathrm{631}}^1$

素因数の和:685

約数の個数: 72

約数和(自身を含む): 162381024

約数和(自身を除く): 80802189

約数列:

[1, 3, 5, 9, 13, 15, 17, 39, 45, 51, 65, 85, 117, 153, 169, 195, 221, 255, 507, 585, 631, 663, 765, 845, 1105, 1521, 1893, 1989, 2535, 2873, 3155, 3315, 5679, 7605, 8203, 8619, 9465, 9945, 10727, 14365, 24609, 25857, 28395, 32181, 41015, 43095, 53635, 73827, 96543, 106639, 123045, 129285, 139451, 160905, 319917, 369135, 418353, 482715, 533195, 697255, 959751, 1255059, 1599585, 1812863, 2091765, 4798755, 5438589, 6275295, 9064315, 16315767, 27192945, 81578835]

約数ペア:

[(1, 81578835), (3, 27192945), (5, 16315767), (9, 9064315), (13, 6275295), (15, 5438589), (17, 4798755), (39, 2091765), (45, 1812863), (51, 1599585), (65, 1255059), (85, 959751), (117, 697255), (153, 533195), (169, 482715), (195, 418353), (221, 369135), (255, 319917), (507, 160905), (585, 139451), (631, 129285), (663, 123045), (765, 106639), (845, 96543), (1105, 73827), (1521, 53635), (1893, 43095), (1989, 41015), (2535, 32181), (2873, 28395), (3155, 25857), (3315, 24609), (5679, 14365), (7605, 10727), (8203, 9945), (8619, 9465)]