21691020

素因数分解:

$2^2\times 3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{27809}}^1$

素因数の和:27834

約数の個数: 48

約数和(自身を含む): 65409120

約数和(自身を除く): 43718100

約数列:

[1, 2, 3, 4, 5, 6, 10, 12, 13, 15, 20, 26, 30, 39, 52, 60, 65, 78, 130, 156, 195, 260, 390, 780, 27809, 55618, 83427, 111236, 139045, 166854, 278090, 333708, 361517, 417135, 556180, 723034, 834270, 1084551, 1446068, 1668540, 1807585, 2169102, 3615170, 4338204, 5422755, 7230340, 10845510, 21691020]

約数ペア:

[(1, 21691020), (2, 10845510), (3, 7230340), (4, 5422755), (5, 4338204), (6, 3615170), (10, 2169102), (12, 1807585), (13, 1668540), (15, 1446068), (20, 1084551), (26, 834270), (30, 723034), (39, 556180), (52, 417135), (60, 361517), (65, 333708), (78, 278090), (130, 166854), (156, 139045), (195, 111236), (260, 83427), (390, 55618), (780, 27809)]