20737187120

素因数分解:

$2^4\times 5^1\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{643213}}^1$

素因数の和:643270

約数の個数: 80

約数和(自身を含む): 53597736192

約数和(自身を除く): 32860549072

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 31, 40, 52, 62, 65, 80, 104, 124, 130, 155, 208, 248, 260, 310, 403, 496, 520, 620, 806, 1040, 1240, 1612, 2015, 2480, 3224, 4030, 6448, 8060, 16120, 32240, 643213, 1286426, 2572852, 3216065, 5145704, 6432130, 8361769, 10291408, 12864260, 16723538, 19939603, 25728520, 33447076, 39879206, 41808845, 51457040, 66894152, 79758412, 83617690, 99698015, 133788304, 159516824, 167235380, 199396030, 259214839, 319033648, 334470760, 398792060, 518429678, 668941520, 797584120, 1036859356, 1296074195, 1595168240, 2073718712, 2592148390, 4147437424, 5184296780, 10368593560, 20737187120]

約数ペア:

[(1, 20737187120), (2, 10368593560), (4, 5184296780), (5, 4147437424), (8, 2592148390), (10, 2073718712), (13, 1595168240), (16, 1296074195), (20, 1036859356), (26, 797584120), (31, 668941520), (40, 518429678), (52, 398792060), (62, 334470760), (65, 319033648), (80, 259214839), (104, 199396030), (124, 167235380), (130, 159516824), (155, 133788304), (208, 99698015), (248, 83617690), (260, 79758412), (310, 66894152), (403, 51457040), (496, 41808845), (520, 39879206), (620, 33447076), (806, 25728520), (1040, 19939603), (1240, 16723538), (1612, 12864260), (2015, 10291408), (2480, 8361769), (3224, 6432130), (4030, 5145704), (6448, 3216065), (8060, 2572852), (16120, 1286426), (32240, 643213)]