81489290

素因数分解:

$2^1\times 5^1\times {\mathrm{19}}^1\times {\mathrm{61}}^1\times {\mathrm{79}}^1\times {\mathrm{89}}^1$

素因数の和:255

約数の個数: 64

約数和(自身を含む): 160704000

約数和(自身を除く): 79214710

約数列:

[1, 2, 5, 10, 19, 38, 61, 79, 89, 95, 122, 158, 178, 190, 305, 395, 445, 610, 790, 890, 1159, 1501, 1691, 2318, 3002, 3382, 4819, 5429, 5795, 7031, 7505, 8455, 9638, 10858, 11590, 14062, 15010, 16910, 24095, 27145, 35155, 48190, 54290, 70310, 91561, 103151, 133589, 183122, 206302, 267178, 428891, 457805, 515755, 667945, 857782, 915610, 1031510, 1335890, 2144455, 4288910, 8148929, 16297858, 40744645, 81489290]

約数ペア:

[(1, 81489290), (2, 40744645), (5, 16297858), (10, 8148929), (19, 4288910), (38, 2144455), (61, 1335890), (79, 1031510), (89, 915610), (95, 857782), (122, 667945), (158, 515755), (178, 457805), (190, 428891), (305, 267178), (395, 206302), (445, 183122), (610, 133589), (790, 103151), (890, 91561), (1159, 70310), (1501, 54290), (1691, 48190), (2318, 35155), (3002, 27145), (3382, 24095), (4819, 16910), (5429, 15010), (5795, 14062), (7031, 11590), (7505, 10858), (8455, 9638)]