28639520

素因数分解:

$2^5\times 5^1\times 7^2\times {\mathrm{13}}^1\times {\mathrm{281}}^1$

素因数の和:323

約数の個数: 144

約数和(自身を含む): 85063608

約数和(自身を除く): 56424088

約数列:

[1, 2, 4, 5, 7, 8, 10, 13, 14, 16, 20, 26, 28, 32, 35, 40, 49, 52, 56, 65, 70, 80, 91, 98, 104, 112, 130, 140, 160, 182, 196, 208, 224, 245, 260, 280, 281, 364, 392, 416, 455, 490, 520, 560, 562, 637, 728, 784, 910, 980, 1040, 1120, 1124, 1274, 1405, 1456, 1568, 1820, 1960, 1967, 2080, 2248, 2548, 2810, 2912, 3185, 3640, 3653, 3920, 3934, 4496, 5096, 5620, 6370, 7280, 7306, 7840, 7868, 8992, 9835, 10192, 11240, 12740, 13769, 14560, 14612, 15736, 18265, 19670, 20384, 22480, 25480, 25571, 27538, 29224, 31472, 36530, 39340, 44960, 50960, 51142, 55076, 58448, 62944, 68845, 73060, 78680, 101920, 102284, 110152, 116896, 127855, 137690, 146120, 157360, 178997, 204568, 220304, 255710, 275380, 292240, 314720, 357994, 409136, 440608, 511420, 550760, 584480, 715988, 818272, 894985, 1022840, 1101520, 1431976, 1789970, 2045680, 2203040, 2863952, 3579940, 4091360, 5727904, 7159880, 14319760, 28639520]

約数ペア:

[(1, 28639520), (2, 14319760), (4, 7159880), (5, 5727904), (7, 4091360), (8, 3579940), (10, 2863952), (13, 2203040), (14, 2045680), (16, 1789970), (20, 1431976), (26, 1101520), (28, 1022840), (32, 894985), (35, 818272), (40, 715988), (49, 584480), (52, 550760), (56, 511420), (65, 440608), (70, 409136), (80, 357994), (91, 314720), (98, 292240), (104, 275380), (112, 255710), (130, 220304), (140, 204568), (160, 178997), (182, 157360), (196, 146120), (208, 137690), (224, 127855), (245, 116896), (260, 110152), (280, 102284), (281, 101920), (364, 78680), (392, 73060), (416, 68845), (455, 62944), (490, 58448), (520, 55076), (560, 51142), (562, 50960), (637, 44960), (728, 39340), (784, 36530), (910, 31472), (980, 29224), (1040, 27538), (1120, 25571), (1124, 25480), (1274, 22480), (1405, 20384), (1456, 19670), (1568, 18265), (1820, 15736), (1960, 14612), (1967, 14560), (2080, 13769), (2248, 12740), (2548, 11240), (2810, 10192), (2912, 9835), (3185, 8992), (3640, 7868), (3653, 7840), (3920, 7306), (3934, 7280), (4496, 6370), (5096, 5620)]