21272080

素因数分解:

$2^4\times 5^1\times {\mathrm{29}}^1\times {\mathrm{53}}^1\times {\mathrm{173}}^1$

素因数の和:268

約数の個数: 80

約数和(自身を含む): 52429680

約数和(自身を除く): 31157600

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 29, 40, 53, 58, 80, 106, 116, 145, 173, 212, 232, 265, 290, 346, 424, 464, 530, 580, 692, 848, 865, 1060, 1160, 1384, 1537, 1730, 2120, 2320, 2768, 3074, 3460, 4240, 5017, 6148, 6920, 7685, 9169, 10034, 12296, 13840, 15370, 18338, 20068, 24592, 25085, 30740, 36676, 40136, 45845, 50170, 61480, 73352, 80272, 91690, 100340, 122960, 146704, 183380, 200680, 265901, 366760, 401360, 531802, 733520, 1063604, 1329505, 2127208, 2659010, 4254416, 5318020, 10636040, 21272080]

約数ペア:

[(1, 21272080), (2, 10636040), (4, 5318020), (5, 4254416), (8, 2659010), (10, 2127208), (16, 1329505), (20, 1063604), (29, 733520), (40, 531802), (53, 401360), (58, 366760), (80, 265901), (106, 200680), (116, 183380), (145, 146704), (173, 122960), (212, 100340), (232, 91690), (265, 80272), (290, 73352), (346, 61480), (424, 50170), (464, 45845), (530, 40136), (580, 36676), (692, 30740), (848, 25085), (865, 24592), (1060, 20068), (1160, 18338), (1384, 15370), (1537, 13840), (1730, 12296), (2120, 10034), (2320, 9169), (2768, 7685), (3074, 6920), (3460, 6148), (4240, 5017)]