20451760

素因数分解:

$2^4\times 5^1\times 7^1\times {\mathrm{59}}^1\times {\mathrm{619}}^1$

素因数の和:698

約数の個数: 80

約数和(自身を含む): 55353600

約数和(自身を除く): 34901840

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 35, 40, 56, 59, 70, 80, 112, 118, 140, 236, 280, 295, 413, 472, 560, 590, 619, 826, 944, 1180, 1238, 1652, 2065, 2360, 2476, 3095, 3304, 4130, 4333, 4720, 4952, 6190, 6608, 8260, 8666, 9904, 12380, 16520, 17332, 21665, 24760, 33040, 34664, 36521, 43330, 49520, 69328, 73042, 86660, 146084, 173320, 182605, 255647, 292168, 346640, 365210, 511294, 584336, 730420, 1022588, 1278235, 1460840, 2045176, 2556470, 2921680, 4090352, 5112940, 10225880, 20451760]

約数ペア:

[(1, 20451760), (2, 10225880), (4, 5112940), (5, 4090352), (7, 2921680), (8, 2556470), (10, 2045176), (14, 1460840), (16, 1278235), (20, 1022588), (28, 730420), (35, 584336), (40, 511294), (56, 365210), (59, 346640), (70, 292168), (80, 255647), (112, 182605), (118, 173320), (140, 146084), (236, 86660), (280, 73042), (295, 69328), (413, 49520), (472, 43330), (560, 36521), (590, 34664), (619, 33040), (826, 24760), (944, 21665), (1180, 17332), (1238, 16520), (1652, 12380), (2065, 9904), (2360, 8666), (2476, 8260), (3095, 6608), (3304, 6190), (4130, 4952), (4333, 4720)]