20901075

素因数分解:

$3^1\times 5^2\times {\mathrm{13}}^2\times {\mathrm{17}}^1\times {\mathrm{97}}^1$

素因数の和:153

約数の個数: 72

約数和(自身を含む): 40028688

約数和(自身を除く): 19127613

約数列:

[1, 3, 5, 13, 15, 17, 25, 39, 51, 65, 75, 85, 97, 169, 195, 221, 255, 291, 325, 425, 485, 507, 663, 845, 975, 1105, 1261, 1275, 1455, 1649, 2425, 2535, 2873, 3315, 3783, 4225, 4947, 5525, 6305, 7275, 8245, 8619, 12675, 14365, 16393, 16575, 18915, 21437, 24735, 31525, 41225, 43095, 49179, 64311, 71825, 81965, 94575, 107185, 123675, 215475, 245895, 278681, 321555, 409825, 535925, 836043, 1229475, 1393405, 1607775, 4180215, 6967025, 20901075]

約数ペア:

[(1, 20901075), (3, 6967025), (5, 4180215), (13, 1607775), (15, 1393405), (17, 1229475), (25, 836043), (39, 535925), (51, 409825), (65, 321555), (75, 278681), (85, 245895), (97, 215475), (169, 123675), (195, 107185), (221, 94575), (255, 81965), (291, 71825), (325, 64311), (425, 49179), (485, 43095), (507, 41225), (663, 31525), (845, 24735), (975, 21437), (1105, 18915), (1261, 16575), (1275, 16393), (1455, 14365), (1649, 12675), (2425, 8619), (2535, 8245), (2873, 7275), (3315, 6305), (3783, 5525), (4225, 4947)]