21428960

素因数分解:

$2^5\times 5^1\times 7^1\times {\mathrm{19}}^2\times {\mathrm{53}}^1$

素因数の和:113

約数の個数: 144

約数和(自身を含む): 62215776

約数和(自身を除く): 40786816

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 19, 20, 28, 32, 35, 38, 40, 53, 56, 70, 76, 80, 95, 106, 112, 133, 140, 152, 160, 190, 212, 224, 265, 266, 280, 304, 361, 371, 380, 424, 530, 532, 560, 608, 665, 722, 742, 760, 848, 1007, 1060, 1064, 1120, 1330, 1444, 1484, 1520, 1696, 1805, 1855, 2014, 2120, 2128, 2527, 2660, 2888, 2968, 3040, 3610, 3710, 4028, 4240, 4256, 5035, 5054, 5320, 5776, 5936, 7049, 7220, 7420, 8056, 8480, 10070, 10108, 10640, 11552, 11872, 12635, 14098, 14440, 14840, 16112, 19133, 20140, 20216, 21280, 25270, 28196, 28880, 29680, 32224, 35245, 38266, 40280, 40432, 50540, 56392, 57760, 59360, 70490, 76532, 80560, 80864, 95665, 101080, 112784, 133931, 140980, 153064, 161120, 191330, 202160, 225568, 267862, 281960, 306128, 382660, 404320, 535724, 563920, 612256, 669655, 765320, 1071448, 1127840, 1339310, 1530640, 2142896, 2678620, 3061280, 4285792, 5357240, 10714480, 21428960]

約数ペア:

[(1, 21428960), (2, 10714480), (4, 5357240), (5, 4285792), (7, 3061280), (8, 2678620), (10, 2142896), (14, 1530640), (16, 1339310), (19, 1127840), (20, 1071448), (28, 765320), (32, 669655), (35, 612256), (38, 563920), (40, 535724), (53, 404320), (56, 382660), (70, 306128), (76, 281960), (80, 267862), (95, 225568), (106, 202160), (112, 191330), (133, 161120), (140, 153064), (152, 140980), (160, 133931), (190, 112784), (212, 101080), (224, 95665), (265, 80864), (266, 80560), (280, 76532), (304, 70490), (361, 59360), (371, 57760), (380, 56392), (424, 50540), (530, 40432), (532, 40280), (560, 38266), (608, 35245), (665, 32224), (722, 29680), (742, 28880), (760, 28196), (848, 25270), (1007, 21280), (1060, 20216), (1064, 20140), (1120, 19133), (1330, 16112), (1444, 14840), (1484, 14440), (1520, 14098), (1696, 12635), (1805, 11872), (1855, 11552), (2014, 10640), (2120, 10108), (2128, 10070), (2527, 8480), (2660, 8056), (2888, 7420), (2968, 7220), (3040, 7049), (3610, 5936), (3710, 5776), (4028, 5320), (4240, 5054), (4256, 5035)]