21054320

素因数分解:

$2^4\times 5^1\times 7^2\times {\mathrm{41}}^1\times {\mathrm{131}}^1$

素因数の和:199

約数の個数: 120

約数和(自身を含む): 58777488

約数和(自身を除く): 37723168

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 35, 40, 41, 49, 56, 70, 80, 82, 98, 112, 131, 140, 164, 196, 205, 245, 262, 280, 287, 328, 392, 410, 490, 524, 560, 574, 655, 656, 784, 820, 917, 980, 1048, 1148, 1310, 1435, 1640, 1834, 1960, 2009, 2096, 2296, 2620, 2870, 3280, 3668, 3920, 4018, 4585, 4592, 5240, 5371, 5740, 6419, 7336, 8036, 9170, 10045, 10480, 10742, 11480, 12838, 14672, 16072, 18340, 20090, 21484, 22960, 25676, 26855, 32095, 32144, 36680, 37597, 40180, 42968, 51352, 53710, 64190, 73360, 75194, 80360, 85936, 102704, 107420, 128380, 150388, 160720, 187985, 214840, 256760, 263179, 300776, 375970, 429680, 513520, 526358, 601552, 751940, 1052716, 1315895, 1503880, 2105432, 2631790, 3007760, 4210864, 5263580, 10527160, 21054320]

約数ペア:

[(1, 21054320), (2, 10527160), (4, 5263580), (5, 4210864), (7, 3007760), (8, 2631790), (10, 2105432), (14, 1503880), (16, 1315895), (20, 1052716), (28, 751940), (35, 601552), (40, 526358), (41, 513520), (49, 429680), (56, 375970), (70, 300776), (80, 263179), (82, 256760), (98, 214840), (112, 187985), (131, 160720), (140, 150388), (164, 128380), (196, 107420), (205, 102704), (245, 85936), (262, 80360), (280, 75194), (287, 73360), (328, 64190), (392, 53710), (410, 51352), (490, 42968), (524, 40180), (560, 37597), (574, 36680), (655, 32144), (656, 32095), (784, 26855), (820, 25676), (917, 22960), (980, 21484), (1048, 20090), (1148, 18340), (1310, 16072), (1435, 14672), (1640, 12838), (1834, 11480), (1960, 10742), (2009, 10480), (2096, 10045), (2296, 9170), (2620, 8036), (2870, 7336), (3280, 6419), (3668, 5740), (3920, 5371), (4018, 5240), (4585, 4592)]