19738040

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{157}}^1\times {\mathrm{449}}^1$

素因数の和:624

約数の個数: 64

約数和(自身を含む): 51192000

約数和(自身を除く): 31453960

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 140, 157, 280, 314, 449, 628, 785, 898, 1099, 1256, 1570, 1796, 2198, 2245, 3140, 3143, 3592, 4396, 4490, 5495, 6280, 6286, 8792, 8980, 10990, 12572, 15715, 17960, 21980, 25144, 31430, 43960, 62860, 70493, 125720, 140986, 281972, 352465, 493451, 563944, 704930, 986902, 1409860, 1973804, 2467255, 2819720, 3947608, 4934510, 9869020, 19738040]

約数ペア:

[(1, 19738040), (2, 9869020), (4, 4934510), (5, 3947608), (7, 2819720), (8, 2467255), (10, 1973804), (14, 1409860), (20, 986902), (28, 704930), (35, 563944), (40, 493451), (56, 352465), (70, 281972), (140, 140986), (157, 125720), (280, 70493), (314, 62860), (449, 43960), (628, 31430), (785, 25144), (898, 21980), (1099, 17960), (1256, 15715), (1570, 12572), (1796, 10990), (2198, 8980), (2245, 8792), (3140, 6286), (3143, 6280), (3592, 5495), (4396, 4490)]