397393960

素因数分解:

$2^3\times 5^1\times {\mathrm{29}}^1\times {\mathrm{31}}^1\times {\mathrm{43}}^1\times {\mathrm{257}}^1$

素因数の和:371

約数の個数: 128

約数和(自身を含む): 980812800

約数和(自身を除く): 583418840

約数列:

[1, 2, 4, 5, 8, 10, 20, 29, 31, 40, 43, 58, 62, 86, 116, 124, 145, 155, 172, 215, 232, 248, 257, 290, 310, 344, 430, 514, 580, 620, 860, 899, 1028, 1160, 1240, 1247, 1285, 1333, 1720, 1798, 2056, 2494, 2570, 2666, 3596, 4495, 4988, 5140, 5332, 6235, 6665, 7192, 7453, 7967, 8990, 9976, 10280, 10664, 11051, 12470, 13330, 14906, 15934, 17980, 22102, 24940, 26660, 29812, 31868, 35960, 37265, 38657, 39835, 44204, 49880, 53320, 55255, 59624, 63736, 74530, 77314, 79670, 88408, 110510, 149060, 154628, 159340, 193285, 221020, 231043, 298120, 309256, 318680, 320479, 342581, 386570, 442040, 462086, 640958, 685162, 773140, 924172, 1155215, 1281916, 1370324, 1546280, 1602395, 1712905, 1848344, 2310430, 2563832, 2740648, 3204790, 3425810, 4620860, 6409580, 6851620, 9241720, 9934849, 12819160, 13703240, 19869698, 39739396, 49674245, 79478792, 99348490, 198696980, 397393960]

約数ペア:

[(1, 397393960), (2, 198696980), (4, 99348490), (5, 79478792), (8, 49674245), (10, 39739396), (20, 19869698), (29, 13703240), (31, 12819160), (40, 9934849), (43, 9241720), (58, 6851620), (62, 6409580), (86, 4620860), (116, 3425810), (124, 3204790), (145, 2740648), (155, 2563832), (172, 2310430), (215, 1848344), (232, 1712905), (248, 1602395), (257, 1546280), (290, 1370324), (310, 1281916), (344, 1155215), (430, 924172), (514, 773140), (580, 685162), (620, 640958), (860, 462086), (899, 442040), (1028, 386570), (1160, 342581), (1240, 320479), (1247, 318680), (1285, 309256), (1333, 298120), (1720, 231043), (1798, 221020), (2056, 193285), (2494, 159340), (2570, 154628), (2666, 149060), (3596, 110510), (4495, 88408), (4988, 79670), (5140, 77314), (5332, 74530), (6235, 63736), (6665, 59624), (7192, 55255), (7453, 53320), (7967, 49880), (8990, 44204), (9976, 39835), (10280, 38657), (10664, 37265), (11051, 35960), (12470, 31868), (13330, 29812), (14906, 26660), (15934, 24940), (17980, 22102)]