21421360

素因数分解:

$2^4\times 5^1\times {\mathrm{17}}^1\times {\mathrm{19}}^1\times {\mathrm{829}}^1$

素因数の和:878

約数の個数: 80

約数和(自身を含む): 55576800

約数和(自身を除く): 34155440

約数列:

[1, 2, 4, 5, 8, 10, 16, 17, 19, 20, 34, 38, 40, 68, 76, 80, 85, 95, 136, 152, 170, 190, 272, 304, 323, 340, 380, 646, 680, 760, 829, 1292, 1360, 1520, 1615, 1658, 2584, 3230, 3316, 4145, 5168, 6460, 6632, 8290, 12920, 13264, 14093, 15751, 16580, 25840, 28186, 31502, 33160, 56372, 63004, 66320, 70465, 78755, 112744, 126008, 140930, 157510, 225488, 252016, 267767, 281860, 315020, 535534, 563720, 630040, 1071068, 1127440, 1260080, 1338835, 2142136, 2677670, 4284272, 5355340, 10710680, 21421360]

約数ペア:

[(1, 21421360), (2, 10710680), (4, 5355340), (5, 4284272), (8, 2677670), (10, 2142136), (16, 1338835), (17, 1260080), (19, 1127440), (20, 1071068), (34, 630040), (38, 563720), (40, 535534), (68, 315020), (76, 281860), (80, 267767), (85, 252016), (95, 225488), (136, 157510), (152, 140930), (170, 126008), (190, 112744), (272, 78755), (304, 70465), (323, 66320), (340, 63004), (380, 56372), (646, 33160), (680, 31502), (760, 28186), (829, 25840), (1292, 16580), (1360, 15751), (1520, 14093), (1615, 13264), (1658, 12920), (2584, 8290), (3230, 6632), (3316, 6460), (4145, 5168)]