81055580

素因数分解:

$2^2\times 5^1\times {\mathrm{29}}^2\times {\mathrm{61}}^1\times {\mathrm{79}}^1$

素因数の和:207

約数の個数: 72

約数和(自身を含む): 181446720

約数和(自身を除く): 100391140

約数列:

[1, 2, 4, 5, 10, 20, 29, 58, 61, 79, 116, 122, 145, 158, 244, 290, 305, 316, 395, 580, 610, 790, 841, 1220, 1580, 1682, 1769, 2291, 3364, 3538, 4205, 4582, 4819, 7076, 8410, 8845, 9164, 9638, 11455, 16820, 17690, 19276, 22910, 24095, 35380, 45820, 48190, 51301, 66439, 96380, 102602, 132878, 139751, 205204, 256505, 265756, 279502, 332195, 513010, 559004, 664390, 698755, 1026020, 1328780, 1397510, 2795020, 4052779, 8105558, 16211116, 20263895, 40527790, 81055580]

約数ペア:

[(1, 81055580), (2, 40527790), (4, 20263895), (5, 16211116), (10, 8105558), (20, 4052779), (29, 2795020), (58, 1397510), (61, 1328780), (79, 1026020), (116, 698755), (122, 664390), (145, 559004), (158, 513010), (244, 332195), (290, 279502), (305, 265756), (316, 256505), (395, 205204), (580, 139751), (610, 132878), (790, 102602), (841, 96380), (1220, 66439), (1580, 51301), (1682, 48190), (1769, 45820), (2291, 35380), (3364, 24095), (3538, 22910), (4205, 19276), (4582, 17690), (4819, 16820), (7076, 11455), (8410, 9638), (8845, 9164)]