1990797680

素因数分解:

$2^4\times 5^1\times {\mathrm{31}}^1\times {\mathrm{157}}^1\times {\mathrm{5113}}^1$

素因数の和:5314

約数の個数: 80

約数和(自身を含む): 4809287424

約数和(自身を除く): 2818489744

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 31, 40, 62, 80, 124, 155, 157, 248, 310, 314, 496, 620, 628, 785, 1240, 1256, 1570, 2480, 2512, 3140, 4867, 5113, 6280, 9734, 10226, 12560, 19468, 20452, 24335, 25565, 38936, 40904, 48670, 51130, 77872, 81808, 97340, 102260, 158503, 194680, 204520, 317006, 389360, 409040, 634012, 792515, 802741, 1268024, 1585030, 1605482, 2536048, 3170060, 3210964, 4013705, 6340120, 6421928, 8027410, 12680240, 12843856, 16054820, 24884971, 32109640, 49769942, 64219280, 99539884, 124424855, 199079768, 248849710, 398159536, 497699420, 995398840, 1990797680]

約数ペア:

[(1, 1990797680), (2, 995398840), (4, 497699420), (5, 398159536), (8, 248849710), (10, 199079768), (16, 124424855), (20, 99539884), (31, 64219280), (40, 49769942), (62, 32109640), (80, 24884971), (124, 16054820), (155, 12843856), (157, 12680240), (248, 8027410), (310, 6421928), (314, 6340120), (496, 4013705), (620, 3210964), (628, 3170060), (785, 2536048), (1240, 1605482), (1256, 1585030), (1570, 1268024), (2480, 802741), (2512, 792515), (3140, 634012), (4867, 409040), (5113, 389360), (6280, 317006), (9734, 204520), (10226, 194680), (12560, 158503), (19468, 102260), (20452, 97340), (24335, 81808), (25565, 77872), (38936, 51130), (40904, 48670)]