20254480

素因数分解:

$2^4\times 5^1\times {\mathrm{17}}^1\times {\mathrm{53}}^1\times {\mathrm{281}}^1$

素因数の和:364

約数の個数: 80

約数和(自身を含む): 50983344

約数和(自身を除く): 30728864

約数列:

[1, 2, 4, 5, 8, 10, 16, 17, 20, 34, 40, 53, 68, 80, 85, 106, 136, 170, 212, 265, 272, 281, 340, 424, 530, 562, 680, 848, 901, 1060, 1124, 1360, 1405, 1802, 2120, 2248, 2810, 3604, 4240, 4496, 4505, 4777, 5620, 7208, 9010, 9554, 11240, 14416, 14893, 18020, 19108, 22480, 23885, 29786, 36040, 38216, 47770, 59572, 72080, 74465, 76432, 95540, 119144, 148930, 191080, 238288, 253181, 297860, 382160, 506362, 595720, 1012724, 1191440, 1265905, 2025448, 2531810, 4050896, 5063620, 10127240, 20254480]

約数ペア:

[(1, 20254480), (2, 10127240), (4, 5063620), (5, 4050896), (8, 2531810), (10, 2025448), (16, 1265905), (17, 1191440), (20, 1012724), (34, 595720), (40, 506362), (53, 382160), (68, 297860), (80, 253181), (85, 238288), (106, 191080), (136, 148930), (170, 119144), (212, 95540), (265, 76432), (272, 74465), (281, 72080), (340, 59572), (424, 47770), (530, 38216), (562, 36040), (680, 29786), (848, 23885), (901, 22480), (1060, 19108), (1124, 18020), (1360, 14893), (1405, 14416), (1802, 11240), (2120, 9554), (2248, 9010), (2810, 7208), (3604, 5620), (4240, 4777), (4496, 4505)]