251356280

素因数分解:

$2^3\times 5^1\times 7^2\times {\mathrm{257}}^1\times {\mathrm{499}}^1$

素因数の和:781

約数の個数: 96

約数和(自身を含む): 661770000

約数和(自身を除く): 410413720

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 49, 56, 70, 98, 140, 196, 245, 257, 280, 392, 490, 499, 514, 980, 998, 1028, 1285, 1799, 1960, 1996, 2056, 2495, 2570, 3493, 3598, 3992, 4990, 5140, 6986, 7196, 8995, 9980, 10280, 12593, 13972, 14392, 17465, 17990, 19960, 24451, 25186, 27944, 34930, 35980, 48902, 50372, 62965, 69860, 71960, 97804, 100744, 122255, 125930, 128243, 139720, 195608, 244510, 251860, 256486, 489020, 503720, 512972, 641215, 897701, 978040, 1025944, 1282430, 1795402, 2564860, 3590804, 4488505, 5129720, 6283907, 7181608, 8977010, 12567814, 17954020, 25135628, 31419535, 35908040, 50271256, 62839070, 125678140, 251356280]

約数ペア:

[(1, 251356280), (2, 125678140), (4, 62839070), (5, 50271256), (7, 35908040), (8, 31419535), (10, 25135628), (14, 17954020), (20, 12567814), (28, 8977010), (35, 7181608), (40, 6283907), (49, 5129720), (56, 4488505), (70, 3590804), (98, 2564860), (140, 1795402), (196, 1282430), (245, 1025944), (257, 978040), (280, 897701), (392, 641215), (490, 512972), (499, 503720), (514, 489020), (980, 256486), (998, 251860), (1028, 244510), (1285, 195608), (1799, 139720), (1960, 128243), (1996, 125930), (2056, 122255), (2495, 100744), (2570, 97804), (3493, 71960), (3598, 69860), (3992, 62965), (4990, 50372), (5140, 48902), (6986, 35980), (7196, 34930), (8995, 27944), (9980, 25186), (10280, 24451), (12593, 19960), (13972, 17990), (14392, 17465)]