21000337520

素因数分解:

$2^4\times 5^1\times {\mathrm{131}}^1\times {\mathrm{1163}}^1\times {\mathrm{1723}}^1$

素因数の和:3030

約数の個数: 80

約数和(自身を含む): 49269382272

約数和(自身を除く): 28269044752

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 131, 262, 524, 655, 1048, 1163, 1310, 1723, 2096, 2326, 2620, 3446, 4652, 5240, 5815, 6892, 8615, 9304, 10480, 11630, 13784, 17230, 18608, 23260, 27568, 34460, 46520, 68920, 93040, 137840, 152353, 225713, 304706, 451426, 609412, 761765, 902852, 1128565, 1218824, 1523530, 1805704, 2003849, 2257130, 2437648, 3047060, 3611408, 4007698, 4514260, 6094120, 8015396, 9028520, 10019245, 12188240, 16030792, 18057040, 20038490, 32061584, 40076980, 80153960, 160307920, 262504219, 525008438, 1050016876, 1312521095, 2100033752, 2625042190, 4200067504, 5250084380, 10500168760, 21000337520]

約数ペア:

[(1, 21000337520), (2, 10500168760), (4, 5250084380), (5, 4200067504), (8, 2625042190), (10, 2100033752), (16, 1312521095), (20, 1050016876), (40, 525008438), (80, 262504219), (131, 160307920), (262, 80153960), (524, 40076980), (655, 32061584), (1048, 20038490), (1163, 18057040), (1310, 16030792), (1723, 12188240), (2096, 10019245), (2326, 9028520), (2620, 8015396), (3446, 6094120), (4652, 4514260), (5240, 4007698), (5815, 3611408), (6892, 3047060), (8615, 2437648), (9304, 2257130), (10480, 2003849), (11630, 1805704), (13784, 1523530), (17230, 1218824), (18608, 1128565), (23260, 902852), (27568, 761765), (34460, 609412), (46520, 451426), (68920, 304706), (93040, 225713), (137840, 152353)]