20731657280

素因数分解:

$2^6\times 5^1\times {\mathrm{1289}}^1\times {\mathrm{50261}}^1$

素因数の和:51567

約数の個数: 56

約数和(自身を含む): 49406540760

約数和(自身を除く): 28674883480

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 160, 320, 1289, 2578, 5156, 6445, 10312, 12890, 20624, 25780, 41248, 50261, 51560, 82496, 100522, 103120, 201044, 206240, 251305, 402088, 412480, 502610, 804176, 1005220, 1608352, 2010440, 3216704, 4020880, 8041760, 16083520, 64786429, 129572858, 259145716, 323932145, 518291432, 647864290, 1036582864, 1295728580, 2073165728, 2591457160, 4146331456, 5182914320, 10365828640, 20731657280]

約数ペア:

[(1, 20731657280), (2, 10365828640), (4, 5182914320), (5, 4146331456), (8, 2591457160), (10, 2073165728), (16, 1295728580), (20, 1036582864), (32, 647864290), (40, 518291432), (64, 323932145), (80, 259145716), (160, 129572858), (320, 64786429), (1289, 16083520), (2578, 8041760), (5156, 4020880), (6445, 3216704), (10312, 2010440), (12890, 1608352), (20624, 1005220), (25780, 804176), (41248, 502610), (50261, 412480), (51560, 402088), (82496, 251305), (100522, 206240), (103120, 201044)]