21020080

素因数分解:

$2^4\times 5^1\times {\mathrm{19}}^1\times {\mathrm{13829}}^1$

素因数の和:13861

約数の個数: 40

約数和(自身を含む): 51447600

約数和(自身を除く): 30427520

約数列:

[1, 2, 4, 5, 8, 10, 16, 19, 20, 38, 40, 76, 80, 95, 152, 190, 304, 380, 760, 1520, 13829, 27658, 55316, 69145, 110632, 138290, 221264, 262751, 276580, 525502, 553160, 1051004, 1106320, 1313755, 2102008, 2627510, 4204016, 5255020, 10510040, 21020080]

約数ペア:

[(1, 21020080), (2, 10510040), (4, 5255020), (5, 4204016), (8, 2627510), (10, 2102008), (16, 1313755), (19, 1106320), (20, 1051004), (38, 553160), (40, 525502), (76, 276580), (80, 262751), (95, 221264), (152, 138290), (190, 110632), (304, 69145), (380, 55316), (760, 27658), (1520, 13829)]