21728160

素因数分解:

$2^5\times 3^2\times 5^1\times {\mathrm{79}}^1\times {\mathrm{191}}^1$

素因数の和:291

約数の個数: 144

約数和(自身を含む): 75479040

約数和(自身を除く): 53750880

約数列:

[1, 2, 3, 4, 5, 6, 8, 9, 10, 12, 15, 16, 18, 20, 24, 30, 32, 36, 40, 45, 48, 60, 72, 79, 80, 90, 96, 120, 144, 158, 160, 180, 191, 237, 240, 288, 316, 360, 382, 395, 474, 480, 573, 632, 711, 720, 764, 790, 948, 955, 1146, 1185, 1264, 1422, 1440, 1528, 1580, 1719, 1896, 1910, 2292, 2370, 2528, 2844, 2865, 3056, 3160, 3438, 3555, 3792, 3820, 4584, 4740, 5688, 5730, 6112, 6320, 6876, 7110, 7584, 7640, 8595, 9168, 9480, 11376, 11460, 12640, 13752, 14220, 15089, 15280, 17190, 18336, 18960, 22752, 22920, 27504, 28440, 30178, 30560, 34380, 37920, 45267, 45840, 55008, 56880, 60356, 68760, 75445, 90534, 91680, 113760, 120712, 135801, 137520, 150890, 181068, 226335, 241424, 271602, 275040, 301780, 362136, 452670, 482848, 543204, 603560, 679005, 724272, 905340, 1086408, 1207120, 1358010, 1448544, 1810680, 2172816, 2414240, 2716020, 3621360, 4345632, 5432040, 7242720, 10864080, 21728160]

約数ペア:

[(1, 21728160), (2, 10864080), (3, 7242720), (4, 5432040), (5, 4345632), (6, 3621360), (8, 2716020), (9, 2414240), (10, 2172816), (12, 1810680), (15, 1448544), (16, 1358010), (18, 1207120), (20, 1086408), (24, 905340), (30, 724272), (32, 679005), (36, 603560), (40, 543204), (45, 482848), (48, 452670), (60, 362136), (72, 301780), (79, 275040), (80, 271602), (90, 241424), (96, 226335), (120, 181068), (144, 150890), (158, 137520), (160, 135801), (180, 120712), (191, 113760), (237, 91680), (240, 90534), (288, 75445), (316, 68760), (360, 60356), (382, 56880), (395, 55008), (474, 45840), (480, 45267), (573, 37920), (632, 34380), (711, 30560), (720, 30178), (764, 28440), (790, 27504), (948, 22920), (955, 22752), (1146, 18960), (1185, 18336), (1264, 17190), (1422, 15280), (1440, 15089), (1528, 14220), (1580, 13752), (1719, 12640), (1896, 11460), (1910, 11376), (2292, 9480), (2370, 9168), (2528, 8595), (2844, 7640), (2865, 7584), (3056, 7110), (3160, 6876), (3438, 6320), (3555, 6112), (3792, 5730), (3820, 5688), (4584, 4740)]