21295400

素因数分解:

$2^3\times 5^2\times 7^2\times {\mathrm{41}}^1\times {\mathrm{53}}^1$

素因数の和:124

約数の個数: 144

約数和(自身を含む): 60113340

約数和(自身を除く): 38817940

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 25, 28, 35, 40, 41, 49, 50, 53, 56, 70, 82, 98, 100, 106, 140, 164, 175, 196, 200, 205, 212, 245, 265, 280, 287, 328, 350, 371, 392, 410, 424, 490, 530, 574, 700, 742, 820, 980, 1025, 1060, 1148, 1225, 1325, 1400, 1435, 1484, 1640, 1855, 1960, 2009, 2050, 2120, 2173, 2296, 2450, 2597, 2650, 2870, 2968, 3710, 4018, 4100, 4346, 4900, 5194, 5300, 5740, 7175, 7420, 8036, 8200, 8692, 9275, 9800, 10045, 10388, 10600, 10865, 11480, 12985, 14350, 14840, 15211, 16072, 17384, 18550, 20090, 20776, 21730, 25970, 28700, 30422, 37100, 40180, 43460, 50225, 51940, 54325, 57400, 60844, 64925, 74200, 76055, 80360, 86920, 100450, 103880, 106477, 108650, 121688, 129850, 152110, 200900, 212954, 217300, 259700, 304220, 380275, 401800, 425908, 434600, 519400, 532385, 608440, 760550, 851816, 1064770, 1521100, 2129540, 2661925, 3042200, 4259080, 5323850, 10647700, 21295400]

約数ペア:

[(1, 21295400), (2, 10647700), (4, 5323850), (5, 4259080), (7, 3042200), (8, 2661925), (10, 2129540), (14, 1521100), (20, 1064770), (25, 851816), (28, 760550), (35, 608440), (40, 532385), (41, 519400), (49, 434600), (50, 425908), (53, 401800), (56, 380275), (70, 304220), (82, 259700), (98, 217300), (100, 212954), (106, 200900), (140, 152110), (164, 129850), (175, 121688), (196, 108650), (200, 106477), (205, 103880), (212, 100450), (245, 86920), (265, 80360), (280, 76055), (287, 74200), (328, 64925), (350, 60844), (371, 57400), (392, 54325), (410, 51940), (424, 50225), (490, 43460), (530, 40180), (574, 37100), (700, 30422), (742, 28700), (820, 25970), (980, 21730), (1025, 20776), (1060, 20090), (1148, 18550), (1225, 17384), (1325, 16072), (1400, 15211), (1435, 14840), (1484, 14350), (1640, 12985), (1855, 11480), (1960, 10865), (2009, 10600), (2050, 10388), (2120, 10045), (2173, 9800), (2296, 9275), (2450, 8692), (2597, 8200), (2650, 8036), (2870, 7420), (2968, 7175), (3710, 5740), (4018, 5300), (4100, 5194), (4346, 4900)]