18904040

素因数分解:

$2^3\times 5^1\times {\mathrm{37}}^1\times {\mathrm{53}}^1\times {\mathrm{241}}^1$

素因数の和:342

約数の個数: 64

約数和(自身を含む): 44692560

約数和(自身を除く): 25788520

約数列:

[1, 2, 4, 5, 8, 10, 20, 37, 40, 53, 74, 106, 148, 185, 212, 241, 265, 296, 370, 424, 482, 530, 740, 964, 1060, 1205, 1480, 1928, 1961, 2120, 2410, 3922, 4820, 7844, 8917, 9640, 9805, 12773, 15688, 17834, 19610, 25546, 35668, 39220, 44585, 51092, 63865, 71336, 78440, 89170, 102184, 127730, 178340, 255460, 356680, 472601, 510920, 945202, 1890404, 2363005, 3780808, 4726010, 9452020, 18904040]

約数ペア:

[(1, 18904040), (2, 9452020), (4, 4726010), (5, 3780808), (8, 2363005), (10, 1890404), (20, 945202), (37, 510920), (40, 472601), (53, 356680), (74, 255460), (106, 178340), (148, 127730), (185, 102184), (212, 89170), (241, 78440), (265, 71336), (296, 63865), (370, 51092), (424, 44585), (482, 39220), (530, 35668), (740, 25546), (964, 19610), (1060, 17834), (1205, 15688), (1480, 12773), (1928, 9805), (1961, 9640), (2120, 8917), (2410, 7844), (3922, 4820)]