20865180

素因数分解:

$2^2\times 3^1\times 5^1\times 7^2\times {\mathrm{47}}^1\times {\mathrm{151}}^1$

素因数の和:224

約数の個数: 144

約数和(自身を含む): 69866496

約数和(自身を除く): 49001316

約数列:

[1, 2, 3, 4, 5, 6, 7, 10, 12, 14, 15, 20, 21, 28, 30, 35, 42, 47, 49, 60, 70, 84, 94, 98, 105, 140, 141, 147, 151, 188, 196, 210, 235, 245, 282, 294, 302, 329, 420, 453, 470, 490, 564, 588, 604, 658, 705, 735, 755, 906, 940, 980, 987, 1057, 1316, 1410, 1470, 1510, 1645, 1812, 1974, 2114, 2265, 2303, 2820, 2940, 3020, 3171, 3290, 3948, 4228, 4530, 4606, 4935, 5285, 6342, 6580, 6909, 7097, 7399, 9060, 9212, 9870, 10570, 11515, 12684, 13818, 14194, 14798, 15855, 19740, 21140, 21291, 22197, 23030, 27636, 28388, 29596, 31710, 34545, 35485, 36995, 42582, 44394, 46060, 49679, 63420, 69090, 70970, 73990, 85164, 88788, 99358, 106455, 110985, 138180, 141940, 147980, 149037, 198716, 212910, 221970, 248395, 298074, 347753, 425820, 443940, 496790, 596148, 695506, 745185, 993580, 1043259, 1391012, 1490370, 1738765, 2086518, 2980740, 3477530, 4173036, 5216295, 6955060, 10432590, 20865180]

約数ペア:

[(1, 20865180), (2, 10432590), (3, 6955060), (4, 5216295), (5, 4173036), (6, 3477530), (7, 2980740), (10, 2086518), (12, 1738765), (14, 1490370), (15, 1391012), (20, 1043259), (21, 993580), (28, 745185), (30, 695506), (35, 596148), (42, 496790), (47, 443940), (49, 425820), (60, 347753), (70, 298074), (84, 248395), (94, 221970), (98, 212910), (105, 198716), (140, 149037), (141, 147980), (147, 141940), (151, 138180), (188, 110985), (196, 106455), (210, 99358), (235, 88788), (245, 85164), (282, 73990), (294, 70970), (302, 69090), (329, 63420), (420, 49679), (453, 46060), (470, 44394), (490, 42582), (564, 36995), (588, 35485), (604, 34545), (658, 31710), (705, 29596), (735, 28388), (755, 27636), (906, 23030), (940, 22197), (980, 21291), (987, 21140), (1057, 19740), (1316, 15855), (1410, 14798), (1470, 14194), (1510, 13818), (1645, 12684), (1812, 11515), (1974, 10570), (2114, 9870), (2265, 9212), (2303, 9060), (2820, 7399), (2940, 7097), (3020, 6909), (3171, 6580), (3290, 6342), (3948, 5285), (4228, 4935), (4530, 4606)]