21008081120

素因数分解:

$2^5\times 5^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{531581}}^1$

素因数の和:531628

約数の個数: 96

約数和(自身を含む): 56262638880

約数和(自身を除く): 35254557760

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 19, 20, 26, 32, 38, 40, 52, 65, 76, 80, 95, 104, 130, 152, 160, 190, 208, 247, 260, 304, 380, 416, 494, 520, 608, 760, 988, 1040, 1235, 1520, 1976, 2080, 2470, 3040, 3952, 4940, 7904, 9880, 19760, 39520, 531581, 1063162, 2126324, 2657905, 4252648, 5315810, 6910553, 8505296, 10100039, 10631620, 13821106, 17010592, 20200078, 21263240, 27642212, 34552765, 40400156, 42526480, 50500195, 55284424, 69105530, 80800312, 85052960, 101000390, 110568848, 131300507, 138211060, 161600624, 202000780, 221137696, 262601014, 276422120, 323201248, 404001560, 525202028, 552844240, 656502535, 808003120, 1050404056, 1105688480, 1313005070, 1616006240, 2100808112, 2626010140, 4201616224, 5252020280, 10504040560, 21008081120]

約数ペア:

[(1, 21008081120), (2, 10504040560), (4, 5252020280), (5, 4201616224), (8, 2626010140), (10, 2100808112), (13, 1616006240), (16, 1313005070), (19, 1105688480), (20, 1050404056), (26, 808003120), (32, 656502535), (38, 552844240), (40, 525202028), (52, 404001560), (65, 323201248), (76, 276422120), (80, 262601014), (95, 221137696), (104, 202000780), (130, 161600624), (152, 138211060), (160, 131300507), (190, 110568848), (208, 101000390), (247, 85052960), (260, 80800312), (304, 69105530), (380, 55284424), (416, 50500195), (494, 42526480), (520, 40400156), (608, 34552765), (760, 27642212), (988, 21263240), (1040, 20200078), (1235, 17010592), (1520, 13821106), (1976, 10631620), (2080, 10100039), (2470, 8505296), (3040, 6910553), (3952, 5315810), (4940, 4252648), (7904, 2657905), (9880, 2126324), (19760, 1063162), (39520, 531581)]