21735420

素因数分解:

$2^2\times 3^1\times 5^1\times 7^2\times {\mathrm{7393}}^1$

素因数の和:7419

約数の個数: 72

約数和(自身を含む): 70804944

約数和(自身を除く): 49069524

約数列:

[1, 2, 3, 4, 5, 6, 7, 10, 12, 14, 15, 20, 21, 28, 30, 35, 42, 49, 60, 70, 84, 98, 105, 140, 147, 196, 210, 245, 294, 420, 490, 588, 735, 980, 1470, 2940, 7393, 14786, 22179, 29572, 36965, 44358, 51751, 73930, 88716, 103502, 110895, 147860, 155253, 207004, 221790, 258755, 310506, 362257, 443580, 517510, 621012, 724514, 776265, 1035020, 1086771, 1449028, 1552530, 1811285, 2173542, 3105060, 3622570, 4347084, 5433855, 7245140, 10867710, 21735420]

約数ペア:

[(1, 21735420), (2, 10867710), (3, 7245140), (4, 5433855), (5, 4347084), (6, 3622570), (7, 3105060), (10, 2173542), (12, 1811285), (14, 1552530), (15, 1449028), (20, 1086771), (21, 1035020), (28, 776265), (30, 724514), (35, 621012), (42, 517510), (49, 443580), (60, 362257), (70, 310506), (84, 258755), (98, 221790), (105, 207004), (140, 155253), (147, 147860), (196, 110895), (210, 103502), (245, 88716), (294, 73930), (420, 51751), (490, 44358), (588, 36965), (735, 29572), (980, 22179), (1470, 14786), (2940, 7393)]