19943920

素因数分解:

$2^4\times 5^1\times {\mathrm{19}}^1\times {\mathrm{13121}}^1$

素因数の和:13153

約数の個数: 40

約数和(自身を含む): 48813840

約数和(自身を除く): 28869920

約数列:

[1, 2, 4, 5, 8, 10, 16, 19, 20, 38, 40, 76, 80, 95, 152, 190, 304, 380, 760, 1520, 13121, 26242, 52484, 65605, 104968, 131210, 209936, 249299, 262420, 498598, 524840, 997196, 1049680, 1246495, 1994392, 2492990, 3988784, 4985980, 9971960, 19943920]

約数ペア:

[(1, 19943920), (2, 9971960), (4, 4985980), (5, 3988784), (8, 2492990), (10, 1994392), (16, 1246495), (19, 1049680), (20, 997196), (38, 524840), (40, 498598), (76, 262420), (80, 249299), (95, 209936), (152, 131210), (190, 104968), (304, 65605), (380, 52484), (760, 26242), (1520, 13121)]