128413420

素因数分解:

$2^2\times 5^1\times {\mathrm{101}}^1\times {\mathrm{151}}^1\times {\mathrm{421}}^1$

素因数の和:682

約数の個数: 48

約数和(自身を含む): 274792896

約数和(自身を除く): 146379476

約数列:

[1, 2, 4, 5, 10, 20, 101, 151, 202, 302, 404, 421, 505, 604, 755, 842, 1010, 1510, 1684, 2020, 2105, 3020, 4210, 8420, 15251, 30502, 42521, 61004, 63571, 76255, 85042, 127142, 152510, 170084, 212605, 254284, 305020, 317855, 425210, 635710, 850420, 1271420, 6420671, 12841342, 25682684, 32103355, 64206710, 128413420]

約数ペア:

[(1, 128413420), (2, 64206710), (4, 32103355), (5, 25682684), (10, 12841342), (20, 6420671), (101, 1271420), (151, 850420), (202, 635710), (302, 425210), (404, 317855), (421, 305020), (505, 254284), (604, 212605), (755, 170084), (842, 152510), (1010, 127142), (1510, 85042), (1684, 76255), (2020, 63571), (2105, 61004), (3020, 42521), (4210, 30502), (8420, 15251)]