81881240

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{229}}^1\times {\mathrm{1277}}^1$

素因数の和:1524

約数の個数: 64

約数和(自身を含む): 211636800

約数和(自身を除く): 129755560

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 140, 229, 280, 458, 916, 1145, 1277, 1603, 1832, 2290, 2554, 3206, 4580, 5108, 6385, 6412, 8015, 8939, 9160, 10216, 12770, 12824, 16030, 17878, 25540, 32060, 35756, 44695, 51080, 64120, 71512, 89390, 178780, 292433, 357560, 584866, 1169732, 1462165, 2047031, 2339464, 2924330, 4094062, 5848660, 8188124, 10235155, 11697320, 16376248, 20470310, 40940620, 81881240]

約数ペア:

[(1, 81881240), (2, 40940620), (4, 20470310), (5, 16376248), (7, 11697320), (8, 10235155), (10, 8188124), (14, 5848660), (20, 4094062), (28, 2924330), (35, 2339464), (40, 2047031), (56, 1462165), (70, 1169732), (140, 584866), (229, 357560), (280, 292433), (458, 178780), (916, 89390), (1145, 71512), (1277, 64120), (1603, 51080), (1832, 44695), (2290, 35756), (2554, 32060), (3206, 25540), (4580, 17878), (5108, 16030), (6385, 12824), (6412, 12770), (8015, 10216), (8939, 9160)]