21797435

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{61}}^1\times {\mathrm{73}}^1\times {\mathrm{89}}^1$

素因数の和:239

約数の個数: 32

約数和(自身を含む): 29730240

約数和(自身を除く): 7932805

約数列:

[1, 5, 11, 55, 61, 73, 89, 305, 365, 445, 671, 803, 979, 3355, 4015, 4453, 4895, 5429, 6497, 22265, 27145, 32485, 48983, 59719, 71467, 244915, 298595, 357335, 396317, 1981585, 4359487, 21797435]

約数ペア:

[(1, 21797435), (5, 4359487), (11, 1981585), (55, 396317), (61, 357335), (73, 298595), (89, 244915), (305, 71467), (365, 59719), (445, 48983), (671, 32485), (803, 27145), (979, 22265), (3355, 6497), (4015, 5429), (4453, 4895)]