21142980

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{23}}^1\times {\mathrm{5107}}^1$

素因数の和:5145

約数の個数: 72

約数和(自身を含む): 66935232

約数和(自身を除く): 45792252

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 23, 30, 36, 45, 46, 60, 69, 90, 92, 115, 138, 180, 207, 230, 276, 345, 414, 460, 690, 828, 1035, 1380, 2070, 4140, 5107, 10214, 15321, 20428, 25535, 30642, 45963, 51070, 61284, 76605, 91926, 102140, 117461, 153210, 183852, 229815, 234922, 306420, 352383, 459630, 469844, 587305, 704766, 919260, 1057149, 1174610, 1409532, 1761915, 2114298, 2349220, 3523830, 4228596, 5285745, 7047660, 10571490, 21142980]

約数ペア:

[(1, 21142980), (2, 10571490), (3, 7047660), (4, 5285745), (5, 4228596), (6, 3523830), (9, 2349220), (10, 2114298), (12, 1761915), (15, 1409532), (18, 1174610), (20, 1057149), (23, 919260), (30, 704766), (36, 587305), (45, 469844), (46, 459630), (60, 352383), (69, 306420), (90, 234922), (92, 229815), (115, 183852), (138, 153210), (180, 117461), (207, 102140), (230, 91926), (276, 76605), (345, 61284), (414, 51070), (460, 45963), (690, 30642), (828, 25535), (1035, 20428), (1380, 15321), (2070, 10214), (4140, 5107)]