20556315

素因数分解:

$3^3\times 5^1\times {\mathrm{13}}^2\times {\mathrm{17}}^1\times {\mathrm{53}}^1$

素因数の和:110

約数の個数: 96

約数和(自身を含む): 42690240

約数和(自身を除く): 22133925

約数列:

[1, 3, 5, 9, 13, 15, 17, 27, 39, 45, 51, 53, 65, 85, 117, 135, 153, 159, 169, 195, 221, 255, 265, 351, 459, 477, 507, 585, 663, 689, 765, 795, 845, 901, 1105, 1431, 1521, 1755, 1989, 2067, 2295, 2385, 2535, 2703, 2873, 3315, 3445, 4505, 4563, 5967, 6201, 7155, 7605, 8109, 8619, 8957, 9945, 10335, 11713, 13515, 14365, 18603, 22815, 24327, 25857, 26871, 29835, 31005, 35139, 40545, 43095, 44785, 58565, 77571, 80613, 93015, 105417, 121635, 129285, 134355, 152269, 175695, 241839, 316251, 387855, 403065, 456807, 527085, 761345, 1209195, 1370421, 1581255, 2284035, 4111263, 6852105, 20556315]

約数ペア:

[(1, 20556315), (3, 6852105), (5, 4111263), (9, 2284035), (13, 1581255), (15, 1370421), (17, 1209195), (27, 761345), (39, 527085), (45, 456807), (51, 403065), (53, 387855), (65, 316251), (85, 241839), (117, 175695), (135, 152269), (153, 134355), (159, 129285), (169, 121635), (195, 105417), (221, 93015), (255, 80613), (265, 77571), (351, 58565), (459, 44785), (477, 43095), (507, 40545), (585, 35139), (663, 31005), (689, 29835), (765, 26871), (795, 25857), (845, 24327), (901, 22815), (1105, 18603), (1431, 14365), (1521, 13515), (1755, 11713), (1989, 10335), (2067, 9945), (2295, 8957), (2385, 8619), (2535, 8109), (2703, 7605), (2873, 7155), (3315, 6201), (3445, 5967), (4505, 4563)]