20745160

素因数分解:

$2^3\times 5^1\times {\mathrm{37}}^1\times {\mathrm{107}}^1\times {\mathrm{131}}^1$

素因数の和:286

約数の個数: 64

約数和(自身を含む): 48755520

約数和(自身を除く): 28010360

約数列:

[1, 2, 4, 5, 8, 10, 20, 37, 40, 74, 107, 131, 148, 185, 214, 262, 296, 370, 428, 524, 535, 655, 740, 856, 1048, 1070, 1310, 1480, 2140, 2620, 3959, 4280, 4847, 5240, 7918, 9694, 14017, 15836, 19388, 19795, 24235, 28034, 31672, 38776, 39590, 48470, 56068, 70085, 79180, 96940, 112136, 140170, 158360, 193880, 280340, 518629, 560680, 1037258, 2074516, 2593145, 4149032, 5186290, 10372580, 20745160]

約数ペア:

[(1, 20745160), (2, 10372580), (4, 5186290), (5, 4149032), (8, 2593145), (10, 2074516), (20, 1037258), (37, 560680), (40, 518629), (74, 280340), (107, 193880), (131, 158360), (148, 140170), (185, 112136), (214, 96940), (262, 79180), (296, 70085), (370, 56068), (428, 48470), (524, 39590), (535, 38776), (655, 31672), (740, 28034), (856, 24235), (1048, 19795), (1070, 19388), (1310, 15836), (1480, 14017), (2140, 9694), (2620, 7918), (3959, 5240), (4280, 4847)]