20742120

素因数分解:

$2^3\times 3^2\times 5^1\times 7^1\times {\mathrm{8231}}^1$

素因数の和:8255

約数の個数: 96

約数和(自身を含む): 77051520

約数和(自身を除く): 56309400

約数列:

[1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 12, 14, 15, 18, 20, 21, 24, 28, 30, 35, 36, 40, 42, 45, 56, 60, 63, 70, 72, 84, 90, 105, 120, 126, 140, 168, 180, 210, 252, 280, 315, 360, 420, 504, 630, 840, 1260, 2520, 8231, 16462, 24693, 32924, 41155, 49386, 57617, 65848, 74079, 82310, 98772, 115234, 123465, 148158, 164620, 172851, 197544, 230468, 246930, 288085, 296316, 329240, 345702, 370395, 460936, 493860, 518553, 576170, 592632, 691404, 740790, 864255, 987720, 1037106, 1152340, 1382808, 1481580, 1728510, 2074212, 2304680, 2592765, 2963160, 3457020, 4148424, 5185530, 6914040, 10371060, 20742120]

約数ペア:

[(1, 20742120), (2, 10371060), (3, 6914040), (4, 5185530), (5, 4148424), (6, 3457020), (7, 2963160), (8, 2592765), (9, 2304680), (10, 2074212), (12, 1728510), (14, 1481580), (15, 1382808), (18, 1152340), (20, 1037106), (21, 987720), (24, 864255), (28, 740790), (30, 691404), (35, 592632), (36, 576170), (40, 518553), (42, 493860), (45, 460936), (56, 370395), (60, 345702), (63, 329240), (70, 296316), (72, 288085), (84, 246930), (90, 230468), (105, 197544), (120, 172851), (126, 164620), (140, 148158), (168, 123465), (180, 115234), (210, 98772), (252, 82310), (280, 74079), (315, 65848), (360, 57617), (420, 49386), (504, 41155), (630, 32924), (840, 24693), (1260, 16462), (2520, 8231)]