21428355

素因数分解:

$3^1\times 5^1\times {\mathrm{13}}^2\times {\mathrm{79}}^1\times {\mathrm{107}}^1$

素因数の和:220

約数の個数: 48

約数和(自身を含む): 37946880

約数和(自身を除く): 16518525

約数列:

[1, 3, 5, 13, 15, 39, 65, 79, 107, 169, 195, 237, 321, 395, 507, 535, 845, 1027, 1185, 1391, 1605, 2535, 3081, 4173, 5135, 6955, 8453, 13351, 15405, 18083, 20865, 25359, 40053, 42265, 54249, 66755, 90415, 109889, 126795, 200265, 271245, 329667, 549445, 1428557, 1648335, 4285671, 7142785, 21428355]

約数ペア:

[(1, 21428355), (3, 7142785), (5, 4285671), (13, 1648335), (15, 1428557), (39, 549445), (65, 329667), (79, 271245), (107, 200265), (169, 126795), (195, 109889), (237, 90415), (321, 66755), (395, 54249), (507, 42265), (535, 40053), (845, 25359), (1027, 20865), (1185, 18083), (1391, 15405), (1605, 13351), (2535, 8453), (3081, 6955), (4173, 5135)]