21537555

素因数分解:

$3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{73}}^1\times {\mathrm{89}}^1$

素因数の和:200

約数の個数: 64

約数和(自身を含む): 40279680

約数和(自身を除く): 18742125

約数列:

[1, 3, 5, 13, 15, 17, 39, 51, 65, 73, 85, 89, 195, 219, 221, 255, 267, 365, 445, 663, 949, 1095, 1105, 1157, 1241, 1335, 1513, 2847, 3315, 3471, 3723, 4539, 4745, 5785, 6205, 6497, 7565, 14235, 16133, 17355, 18615, 19491, 19669, 22695, 32485, 48399, 59007, 80665, 84461, 97455, 98345, 110449, 241995, 253383, 295035, 331347, 422305, 552245, 1266915, 1435837, 1656735, 4307511, 7179185, 21537555]

約数ペア:

[(1, 21537555), (3, 7179185), (5, 4307511), (13, 1656735), (15, 1435837), (17, 1266915), (39, 552245), (51, 422305), (65, 331347), (73, 295035), (85, 253383), (89, 241995), (195, 110449), (219, 98345), (221, 97455), (255, 84461), (267, 80665), (365, 59007), (445, 48399), (663, 32485), (949, 22695), (1095, 19669), (1105, 19491), (1157, 18615), (1241, 17355), (1335, 16133), (1513, 14235), (2847, 7565), (3315, 6497), (3471, 6205), (3723, 5785), (4539, 4745)]