21801680

素因数分解:

$2^4\times 5^1\times {\mathrm{31}}^1\times {\mathrm{59}}^1\times {\mathrm{149}}^1$

素因数の和:252

約数の個数: 80

約数和(自身を含む): 53568000

約数和(自身を除く): 31766320

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 31, 40, 59, 62, 80, 118, 124, 149, 155, 236, 248, 295, 298, 310, 472, 496, 590, 596, 620, 745, 944, 1180, 1192, 1240, 1490, 1829, 2360, 2384, 2480, 2980, 3658, 4619, 4720, 5960, 7316, 8791, 9145, 9238, 11920, 14632, 17582, 18290, 18476, 23095, 29264, 35164, 36580, 36952, 43955, 46190, 70328, 73160, 73904, 87910, 92380, 140656, 146320, 175820, 184760, 272521, 351640, 369520, 545042, 703280, 1090084, 1362605, 2180168, 2725210, 4360336, 5450420, 10900840, 21801680]

約数ペア:

[(1, 21801680), (2, 10900840), (4, 5450420), (5, 4360336), (8, 2725210), (10, 2180168), (16, 1362605), (20, 1090084), (31, 703280), (40, 545042), (59, 369520), (62, 351640), (80, 272521), (118, 184760), (124, 175820), (149, 146320), (155, 140656), (236, 92380), (248, 87910), (295, 73904), (298, 73160), (310, 70328), (472, 46190), (496, 43955), (590, 36952), (596, 36580), (620, 35164), (745, 29264), (944, 23095), (1180, 18476), (1192, 18290), (1240, 17582), (1490, 14632), (1829, 11920), (2360, 9238), (2384, 9145), (2480, 8791), (2980, 7316), (3658, 5960), (4619, 4720)]