19713520

素因数分解:

$2^4\times 5^1\times {\mathrm{31}}^1\times {\mathrm{7949}}^1$

素因数の和:7993

約数の個数: 40

約数和(自身を含む): 47318400

約数和(自身を除く): 27604880

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 31, 40, 62, 80, 124, 155, 248, 310, 496, 620, 1240, 2480, 7949, 15898, 31796, 39745, 63592, 79490, 127184, 158980, 246419, 317960, 492838, 635920, 985676, 1232095, 1971352, 2464190, 3942704, 4928380, 9856760, 19713520]

約数ペア:

[(1, 19713520), (2, 9856760), (4, 4928380), (5, 3942704), (8, 2464190), (10, 1971352), (16, 1232095), (20, 985676), (31, 635920), (40, 492838), (62, 317960), (80, 246419), (124, 158980), (155, 127184), (248, 79490), (310, 63592), (496, 39745), (620, 31796), (1240, 15898), (2480, 7949)]