203919220

素因数分解:

$2^2\times 5^1\times {\mathrm{97}}^1\times {\mathrm{257}}^1\times {\mathrm{409}}^1$

素因数の和:772

約数の個数: 48

約数和(自身を含む): 435390480

約数和(自身を除く): 231471260

約数列:

[1, 2, 4, 5, 10, 20, 97, 194, 257, 388, 409, 485, 514, 818, 970, 1028, 1285, 1636, 1940, 2045, 2570, 4090, 5140, 8180, 24929, 39673, 49858, 79346, 99716, 105113, 124645, 158692, 198365, 210226, 249290, 396730, 420452, 498580, 525565, 793460, 1051130, 2102260, 10195961, 20391922, 40783844, 50979805, 101959610, 203919220]

約数ペア:

[(1, 203919220), (2, 101959610), (4, 50979805), (5, 40783844), (10, 20391922), (20, 10195961), (97, 2102260), (194, 1051130), (257, 793460), (388, 525565), (409, 498580), (485, 420452), (514, 396730), (818, 249290), (970, 210226), (1028, 198365), (1285, 158692), (1636, 124645), (1940, 105113), (2045, 99716), (2570, 79346), (4090, 49858), (5140, 39673), (8180, 24929)]