21171605

素因数分解:

$5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{31}}^1\times {\mathrm{79}}^1$

素因数の和:154

約数の個数: 64

約数和(自身を含む): 34406400

約数和(自身を除く): 13234795

約数列:

[1, 5, 7, 13, 19, 31, 35, 65, 79, 91, 95, 133, 155, 217, 247, 395, 403, 455, 553, 589, 665, 1027, 1085, 1235, 1501, 1729, 2015, 2449, 2765, 2821, 2945, 4123, 5135, 7189, 7505, 7657, 8645, 10507, 12245, 14105, 17143, 19513, 20615, 31837, 35945, 38285, 46531, 52535, 53599, 85715, 97565, 136591, 159185, 222859, 232655, 267995, 325717, 604903, 682955, 1114295, 1628585, 3024515, 4234321, 21171605]

約数ペア:

[(1, 21171605), (5, 4234321), (7, 3024515), (13, 1628585), (19, 1114295), (31, 682955), (35, 604903), (65, 325717), (79, 267995), (91, 232655), (95, 222859), (133, 159185), (155, 136591), (217, 97565), (247, 85715), (395, 53599), (403, 52535), (455, 46531), (553, 38285), (589, 35945), (665, 31837), (1027, 20615), (1085, 19513), (1235, 17143), (1501, 14105), (1729, 12245), (2015, 10507), (2449, 8645), (2765, 7657), (2821, 7505), (2945, 7189), (4123, 5135)]