21005250

素因数分解:

$2^1\times 3^1\times 5^3\times 7^1\times {\mathrm{4001}}^1$

素因数の和:4028

約数の個数: 64

約数和(自身を含む): 59933952

約数和(自身を除く): 38928702

約数列:

[1, 2, 3, 5, 6, 7, 10, 14, 15, 21, 25, 30, 35, 42, 50, 70, 75, 105, 125, 150, 175, 210, 250, 350, 375, 525, 750, 875, 1050, 1750, 2625, 4001, 5250, 8002, 12003, 20005, 24006, 28007, 40010, 56014, 60015, 84021, 100025, 120030, 140035, 168042, 200050, 280070, 300075, 420105, 500125, 600150, 700175, 840210, 1000250, 1400350, 1500375, 2100525, 3000750, 3500875, 4201050, 7001750, 10502625, 21005250]

約数ペア:

[(1, 21005250), (2, 10502625), (3, 7001750), (5, 4201050), (6, 3500875), (7, 3000750), (10, 2100525), (14, 1500375), (15, 1400350), (21, 1000250), (25, 840210), (30, 700175), (35, 600150), (42, 500125), (50, 420105), (70, 300075), (75, 280070), (105, 200050), (125, 168042), (150, 140035), (175, 120030), (210, 100025), (250, 84021), (350, 60015), (375, 56014), (525, 40010), (750, 28007), (875, 24006), (1050, 20005), (1750, 12003), (2625, 8002), (4001, 5250)]