21002680

素因数分解:

$2^3\times 5^1\times {\mathrm{23}}^1\times {\mathrm{37}}^1\times {\mathrm{617}}^1$

素因数の和:688

約数の個数: 64

約数和(自身を含む): 50725440

約数和(自身を除く): 29722760

約数列:

[1, 2, 4, 5, 8, 10, 20, 23, 37, 40, 46, 74, 92, 115, 148, 184, 185, 230, 296, 370, 460, 617, 740, 851, 920, 1234, 1480, 1702, 2468, 3085, 3404, 4255, 4936, 6170, 6808, 8510, 12340, 14191, 17020, 22829, 24680, 28382, 34040, 45658, 56764, 70955, 91316, 113528, 114145, 141910, 182632, 228290, 283820, 456580, 525067, 567640, 913160, 1050134, 2100268, 2625335, 4200536, 5250670, 10501340, 21002680]

約数ペア:

[(1, 21002680), (2, 10501340), (4, 5250670), (5, 4200536), (8, 2625335), (10, 2100268), (20, 1050134), (23, 913160), (37, 567640), (40, 525067), (46, 456580), (74, 283820), (92, 228290), (115, 182632), (148, 141910), (184, 114145), (185, 113528), (230, 91316), (296, 70955), (370, 56764), (460, 45658), (617, 34040), (740, 28382), (851, 24680), (920, 22829), (1234, 17020), (1480, 14191), (1702, 12340), (2468, 8510), (3085, 6808), (3404, 6170), (4255, 4936)]