21250300

素因数分解:

$2^2\times 5^2\times {\mathrm{41}}^1\times {\mathrm{71}}^1\times {\mathrm{73}}^1$

素因数の和:199

約数の個数: 72

約数和(自身を含む): 48559392

約数和(自身を除く): 27309092

約数列:

[1, 2, 4, 5, 10, 20, 25, 41, 50, 71, 73, 82, 100, 142, 146, 164, 205, 284, 292, 355, 365, 410, 710, 730, 820, 1025, 1420, 1460, 1775, 1825, 2050, 2911, 2993, 3550, 3650, 4100, 5183, 5822, 5986, 7100, 7300, 10366, 11644, 11972, 14555, 14965, 20732, 25915, 29110, 29930, 51830, 58220, 59860, 72775, 74825, 103660, 129575, 145550, 149650, 212503, 259150, 291100, 299300, 425006, 518300, 850012, 1062515, 2125030, 4250060, 5312575, 10625150, 21250300]

約数ペア:

[(1, 21250300), (2, 10625150), (4, 5312575), (5, 4250060), (10, 2125030), (20, 1062515), (25, 850012), (41, 518300), (50, 425006), (71, 299300), (73, 291100), (82, 259150), (100, 212503), (142, 149650), (146, 145550), (164, 129575), (205, 103660), (284, 74825), (292, 72775), (355, 59860), (365, 58220), (410, 51830), (710, 29930), (730, 29110), (820, 25915), (1025, 20732), (1420, 14965), (1460, 14555), (1775, 11972), (1825, 11644), (2050, 10366), (2911, 7300), (2993, 7100), (3550, 5986), (3650, 5822), (4100, 5183)]