21710780

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{79}}^1\times {\mathrm{151}}^1$

素因数の和:259

約数の個数: 96

約数和(自身を含む): 57200640

約数和(自身を除く): 35489860

約数列:

[1, 2, 4, 5, 7, 10, 13, 14, 20, 26, 28, 35, 52, 65, 70, 79, 91, 130, 140, 151, 158, 182, 260, 302, 316, 364, 395, 455, 553, 604, 755, 790, 910, 1027, 1057, 1106, 1510, 1580, 1820, 1963, 2054, 2114, 2212, 2765, 3020, 3926, 4108, 4228, 5135, 5285, 5530, 7189, 7852, 9815, 10270, 10570, 11060, 11929, 13741, 14378, 19630, 20540, 21140, 23858, 27482, 28756, 35945, 39260, 47716, 54964, 59645, 68705, 71890, 83503, 119290, 137410, 143780, 155077, 167006, 238580, 274820, 310154, 334012, 417515, 620308, 775385, 835030, 1085539, 1550770, 1670060, 2171078, 3101540, 4342156, 5427695, 10855390, 21710780]

約数ペア:

[(1, 21710780), (2, 10855390), (4, 5427695), (5, 4342156), (7, 3101540), (10, 2171078), (13, 1670060), (14, 1550770), (20, 1085539), (26, 835030), (28, 775385), (35, 620308), (52, 417515), (65, 334012), (70, 310154), (79, 274820), (91, 238580), (130, 167006), (140, 155077), (151, 143780), (158, 137410), (182, 119290), (260, 83503), (302, 71890), (316, 68705), (364, 59645), (395, 54964), (455, 47716), (553, 39260), (604, 35945), (755, 28756), (790, 27482), (910, 23858), (1027, 21140), (1057, 20540), (1106, 19630), (1510, 14378), (1580, 13741), (1820, 11929), (1963, 11060), (2054, 10570), (2114, 10270), (2212, 9815), (2765, 7852), (3020, 7189), (3926, 5530), (4108, 5285), (4228, 5135)]