778879720

素因数分解:

$2^3\times 5^1\times {\mathrm{61}}^2\times {\mathrm{5233}}^1$

素因数の和:5366

約数の個数: 48

約数和(自身を含む): 1782019980

約数和(自身を除く): 1003140260

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 61, 122, 244, 305, 488, 610, 1220, 2440, 3721, 5233, 7442, 10466, 14884, 18605, 20932, 26165, 29768, 37210, 41864, 52330, 74420, 104660, 148840, 209320, 319213, 638426, 1276852, 1596065, 2553704, 3192130, 6384260, 12768520, 19471993, 38943986, 77887972, 97359965, 155775944, 194719930, 389439860, 778879720]

約数ペア:

[(1, 778879720), (2, 389439860), (4, 194719930), (5, 155775944), (8, 97359965), (10, 77887972), (20, 38943986), (40, 19471993), (61, 12768520), (122, 6384260), (244, 3192130), (305, 2553704), (488, 1596065), (610, 1276852), (1220, 638426), (2440, 319213), (3721, 209320), (5233, 148840), (7442, 104660), (10466, 74420), (14884, 52330), (18605, 41864), (20932, 37210), (26165, 29768)]