21878415

素因数分解:

$3^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{149}}^1\times {\mathrm{251}}^1$

素因数の和:424

約数の個数: 48

約数和(自身を含む): 41277600

約数和(自身を除く): 19399185

約数列:

[1, 3, 5, 9, 13, 15, 39, 45, 65, 117, 149, 195, 251, 447, 585, 745, 753, 1255, 1341, 1937, 2235, 2259, 3263, 3765, 5811, 6705, 9685, 9789, 11295, 16315, 17433, 29055, 29367, 37399, 48945, 87165, 112197, 146835, 186995, 336591, 486187, 560985, 1458561, 1682955, 2430935, 4375683, 7292805, 21878415]

約数ペア:

[(1, 21878415), (3, 7292805), (5, 4375683), (9, 2430935), (13, 1682955), (15, 1458561), (39, 560985), (45, 486187), (65, 336591), (117, 186995), (149, 146835), (195, 112197), (251, 87165), (447, 48945), (585, 37399), (745, 29367), (753, 29055), (1255, 17433), (1341, 16315), (1937, 11295), (2235, 9789), (2259, 9685), (3263, 6705), (3765, 5811)]