81308640

素因数分解:

$2^5\times 3^1\times 5^1\times 7^2\times {\mathrm{3457}}^1$

素因数の和:3489

約数の個数: 144

約数和(自身を含む): 298024272

約数和(自身を除く): 216715632

約数列:

[1, 2, 3, 4, 5, 6, 7, 8, 10, 12, 14, 15, 16, 20, 21, 24, 28, 30, 32, 35, 40, 42, 48, 49, 56, 60, 70, 80, 84, 96, 98, 105, 112, 120, 140, 147, 160, 168, 196, 210, 224, 240, 245, 280, 294, 336, 392, 420, 480, 490, 560, 588, 672, 735, 784, 840, 980, 1120, 1176, 1470, 1568, 1680, 1960, 2352, 2940, 3360, 3457, 3920, 4704, 5880, 6914, 7840, 10371, 11760, 13828, 17285, 20742, 23520, 24199, 27656, 34570, 41484, 48398, 51855, 55312, 69140, 72597, 82968, 96796, 103710, 110624, 120995, 138280, 145194, 165936, 169393, 193592, 207420, 241990, 276560, 290388, 331872, 338786, 362985, 387184, 414840, 483980, 508179, 553120, 580776, 677572, 725970, 774368, 829680, 846965, 967960, 1016358, 1161552, 1355144, 1451940, 1659360, 1693930, 1935920, 2032716, 2323104, 2540895, 2710288, 2903880, 3387860, 3871840, 4065432, 5081790, 5420576, 5807760, 6775720, 8130864, 10163580, 11615520, 13551440, 16261728, 20327160, 27102880, 40654320, 81308640]

約数ペア:

[(1, 81308640), (2, 40654320), (3, 27102880), (4, 20327160), (5, 16261728), (6, 13551440), (7, 11615520), (8, 10163580), (10, 8130864), (12, 6775720), (14, 5807760), (15, 5420576), (16, 5081790), (20, 4065432), (21, 3871840), (24, 3387860), (28, 2903880), (30, 2710288), (32, 2540895), (35, 2323104), (40, 2032716), (42, 1935920), (48, 1693930), (49, 1659360), (56, 1451940), (60, 1355144), (70, 1161552), (80, 1016358), (84, 967960), (96, 846965), (98, 829680), (105, 774368), (112, 725970), (120, 677572), (140, 580776), (147, 553120), (160, 508179), (168, 483980), (196, 414840), (210, 387184), (224, 362985), (240, 338786), (245, 331872), (280, 290388), (294, 276560), (336, 241990), (392, 207420), (420, 193592), (480, 169393), (490, 165936), (560, 145194), (588, 138280), (672, 120995), (735, 110624), (784, 103710), (840, 96796), (980, 82968), (1120, 72597), (1176, 69140), (1470, 55312), (1568, 51855), (1680, 48398), (1960, 41484), (2352, 34570), (2940, 27656), (3360, 24199), (3457, 23520), (3920, 20742), (4704, 17285), (5880, 13828), (6914, 11760), (7840, 10371)]