20385890

素因数分解:

$2^1\times 5^1\times 7^1\times {\mathrm{17}}^1\times {\mathrm{37}}^1\times {\mathrm{463}}^1$

素因数の和:531

約数の個数: 64

約数和(自身を含む): 45702144

約数和(自身を除く): 25316254

約数列:

[1, 2, 5, 7, 10, 14, 17, 34, 35, 37, 70, 74, 85, 119, 170, 185, 238, 259, 370, 463, 518, 595, 629, 926, 1190, 1258, 1295, 2315, 2590, 3145, 3241, 4403, 4630, 6290, 6482, 7871, 8806, 15742, 16205, 17131, 22015, 32410, 34262, 39355, 44030, 55097, 78710, 85655, 110194, 119917, 171310, 239834, 275485, 291227, 550970, 582454, 599585, 1199170, 1456135, 2038589, 2912270, 4077178, 10192945, 20385890]

約数ペア:

[(1, 20385890), (2, 10192945), (5, 4077178), (7, 2912270), (10, 2038589), (14, 1456135), (17, 1199170), (34, 599585), (35, 582454), (37, 550970), (70, 291227), (74, 275485), (85, 239834), (119, 171310), (170, 119917), (185, 110194), (238, 85655), (259, 78710), (370, 55097), (463, 44030), (518, 39355), (595, 34262), (629, 32410), (926, 22015), (1190, 17131), (1258, 16205), (1295, 15742), (2315, 8806), (2590, 7871), (3145, 6482), (3241, 6290), (4403, 4630)]