256801428

素因数分解:

$2^2\times 3^5\times {\mathrm{13}}^1\times {\mathrm{20323}}^1$

素因数の和:20355

約数の個数: 72

約数和(自身を含む): 724997728

約数和(自身を除く): 468196300

約数列:

[1, 2, 3, 4, 6, 9, 12, 13, 18, 26, 27, 36, 39, 52, 54, 78, 81, 108, 117, 156, 162, 234, 243, 324, 351, 468, 486, 702, 972, 1053, 1404, 2106, 3159, 4212, 6318, 12636, 20323, 40646, 60969, 81292, 121938, 182907, 243876, 264199, 365814, 528398, 548721, 731628, 792597, 1056796, 1097442, 1585194, 1646163, 2194884, 2377791, 3170388, 3292326, 4755582, 4938489, 6584652, 7133373, 9511164, 9876978, 14266746, 19753956, 21400119, 28533492, 42800238, 64200357, 85600476, 128400714, 256801428]

約数ペア:

[(1, 256801428), (2, 128400714), (3, 85600476), (4, 64200357), (6, 42800238), (9, 28533492), (12, 21400119), (13, 19753956), (18, 14266746), (26, 9876978), (27, 9511164), (36, 7133373), (39, 6584652), (52, 4938489), (54, 4755582), (78, 3292326), (81, 3170388), (108, 2377791), (117, 2194884), (156, 1646163), (162, 1585194), (234, 1097442), (243, 1056796), (324, 792597), (351, 731628), (468, 548721), (486, 528398), (702, 365814), (972, 264199), (1053, 243876), (1404, 182907), (2106, 121938), (3159, 81292), (4212, 60969), (6318, 40646), (12636, 20323)]