20860980

素因数分解:

$2^2\times 3^1\times 5^1\times 7^1\times {\mathrm{49669}}^1$

素因数の和:49688

約数の個数: 48

約数和(自身を含む): 66756480

約数和(自身を除く): 45895500

約数列:

[1, 2, 3, 4, 5, 6, 7, 10, 12, 14, 15, 20, 21, 28, 30, 35, 42, 60, 70, 84, 105, 140, 210, 420, 49669, 99338, 149007, 198676, 248345, 298014, 347683, 496690, 596028, 695366, 745035, 993380, 1043049, 1390732, 1490070, 1738415, 2086098, 2980140, 3476830, 4172196, 5215245, 6953660, 10430490, 20860980]

約数ペア:

[(1, 20860980), (2, 10430490), (3, 6953660), (4, 5215245), (5, 4172196), (6, 3476830), (7, 2980140), (10, 2086098), (12, 1738415), (14, 1490070), (15, 1390732), (20, 1043049), (21, 993380), (28, 745035), (30, 695366), (35, 596028), (42, 496690), (60, 347683), (70, 298014), (84, 248345), (105, 198676), (140, 149007), (210, 99338), (420, 49669)]