21040740

素因数分解:

$2^2\times 3^2\times 5^1\times 7^1\times {\mathrm{16699}}^1$

素因数の和:16721

約数の個数: 72

約数和(自身を含む): 72945600

約数和(自身を除く): 51904860

約数列:

[1, 2, 3, 4, 5, 6, 7, 9, 10, 12, 14, 15, 18, 20, 21, 28, 30, 35, 36, 42, 45, 60, 63, 70, 84, 90, 105, 126, 140, 180, 210, 252, 315, 420, 630, 1260, 16699, 33398, 50097, 66796, 83495, 100194, 116893, 150291, 166990, 200388, 233786, 250485, 300582, 333980, 350679, 467572, 500970, 584465, 601164, 701358, 751455, 1001940, 1052037, 1168930, 1402716, 1502910, 1753395, 2104074, 2337860, 3005820, 3506790, 4208148, 5260185, 7013580, 10520370, 21040740]

約数ペア:

[(1, 21040740), (2, 10520370), (3, 7013580), (4, 5260185), (5, 4208148), (6, 3506790), (7, 3005820), (9, 2337860), (10, 2104074), (12, 1753395), (14, 1502910), (15, 1402716), (18, 1168930), (20, 1052037), (21, 1001940), (28, 751455), (30, 701358), (35, 601164), (36, 584465), (42, 500970), (45, 467572), (60, 350679), (63, 333980), (70, 300582), (84, 250485), (90, 233786), (105, 200388), (126, 166990), (140, 150291), (180, 116893), (210, 100194), (252, 83495), (315, 66796), (420, 50097), (630, 33398), (1260, 16699)]