20757680

素因数分解:

$2^4\times 5^1\times {\mathrm{17}}^1\times {\mathrm{15263}}^1$

素因数の和:15293

約数の個数: 40

約数和(自身を含む): 51103872

約数和(自身を除く): 30346192

約数列:

[1, 2, 4, 5, 8, 10, 16, 17, 20, 34, 40, 68, 80, 85, 136, 170, 272, 340, 680, 1360, 15263, 30526, 61052, 76315, 122104, 152630, 244208, 259471, 305260, 518942, 610520, 1037884, 1221040, 1297355, 2075768, 2594710, 4151536, 5189420, 10378840, 20757680]

約数ペア:

[(1, 20757680), (2, 10378840), (4, 5189420), (5, 4151536), (8, 2594710), (10, 2075768), (16, 1297355), (17, 1221040), (20, 1037884), (34, 610520), (40, 518942), (68, 305260), (80, 259471), (85, 244208), (136, 152630), (170, 122104), (272, 76315), (340, 61052), (680, 30526), (1360, 15263)]