21000201712

素因数分解:

$2^4\times 7^1\times {\mathrm{43}}^1\times {\mathrm{503}}^1\times {\mathrm{8669}}^1$

素因数の和:9230

約数の個数: 80

約数和(自身を含む): 47681948160

約数和(自身を除く): 26681746448

約数列:

[1, 2, 4, 7, 8, 14, 16, 28, 43, 56, 86, 112, 172, 301, 344, 503, 602, 688, 1006, 1204, 2012, 2408, 3521, 4024, 4816, 7042, 8048, 8669, 14084, 17338, 21629, 28168, 34676, 43258, 56336, 60683, 69352, 86516, 121366, 138704, 151403, 173032, 242732, 302806, 346064, 372767, 485464, 605612, 745534, 970928, 1211224, 1491068, 2422448, 2609369, 2982136, 4360507, 5218738, 5964272, 8721014, 10437476, 17442028, 20874952, 30523549, 34884056, 41749904, 61047098, 69768112, 122094196, 187501801, 244188392, 375003602, 488376784, 750007204, 1312512607, 1500014408, 2625025214, 3000028816, 5250050428, 10500100856, 21000201712]

約数ペア:

[(1, 21000201712), (2, 10500100856), (4, 5250050428), (7, 3000028816), (8, 2625025214), (14, 1500014408), (16, 1312512607), (28, 750007204), (43, 488376784), (56, 375003602), (86, 244188392), (112, 187501801), (172, 122094196), (301, 69768112), (344, 61047098), (503, 41749904), (602, 34884056), (688, 30523549), (1006, 20874952), (1204, 17442028), (2012, 10437476), (2408, 8721014), (3521, 5964272), (4024, 5218738), (4816, 4360507), (7042, 2982136), (8048, 2609369), (8669, 2422448), (14084, 1491068), (17338, 1211224), (21629, 970928), (28168, 745534), (34676, 605612), (43258, 485464), (56336, 372767), (60683, 346064), (69352, 302806), (86516, 242732), (121366, 173032), (138704, 151403)]