20422500

素因数分解:

$2^2\times 3^1\times 5^4\times 7^1\times {\mathrm{389}}^1$

素因数の和:423

約数の個数: 120

約数和(自身を含む): 68228160

約数和(自身を除く): 47805660

約数列:

[1, 2, 3, 4, 5, 6, 7, 10, 12, 14, 15, 20, 21, 25, 28, 30, 35, 42, 50, 60, 70, 75, 84, 100, 105, 125, 140, 150, 175, 210, 250, 300, 350, 375, 389, 420, 500, 525, 625, 700, 750, 778, 875, 1050, 1167, 1250, 1500, 1556, 1750, 1875, 1945, 2100, 2334, 2500, 2625, 2723, 3500, 3750, 3890, 4375, 4668, 5250, 5446, 5835, 7500, 7780, 8169, 8750, 9725, 10500, 10892, 11670, 13125, 13615, 16338, 17500, 19450, 23340, 26250, 27230, 29175, 32676, 38900, 40845, 48625, 52500, 54460, 58350, 68075, 81690, 97250, 116700, 136150, 145875, 163380, 194500, 204225, 243125, 272300, 291750, 340375, 408450, 486250, 583500, 680750, 729375, 816900, 972500, 1021125, 1361500, 1458750, 1701875, 2042250, 2917500, 3403750, 4084500, 5105625, 6807500, 10211250, 20422500]

約数ペア:

[(1, 20422500), (2, 10211250), (3, 6807500), (4, 5105625), (5, 4084500), (6, 3403750), (7, 2917500), (10, 2042250), (12, 1701875), (14, 1458750), (15, 1361500), (20, 1021125), (21, 972500), (25, 816900), (28, 729375), (30, 680750), (35, 583500), (42, 486250), (50, 408450), (60, 340375), (70, 291750), (75, 272300), (84, 243125), (100, 204225), (105, 194500), (125, 163380), (140, 145875), (150, 136150), (175, 116700), (210, 97250), (250, 81690), (300, 68075), (350, 58350), (375, 54460), (389, 52500), (420, 48625), (500, 40845), (525, 38900), (625, 32676), (700, 29175), (750, 27230), (778, 26250), (875, 23340), (1050, 19450), (1167, 17500), (1250, 16338), (1500, 13615), (1556, 13125), (1750, 11670), (1875, 10892), (1945, 10500), (2100, 9725), (2334, 8750), (2500, 8169), (2625, 7780), (2723, 7500), (3500, 5835), (3750, 5446), (3890, 5250), (4375, 4668)]