81958380

素因数分解:

$2^2\times 3^1\times 5^1\times 7^2\times {\mathrm{61}}^1\times {\mathrm{457}}^1$

素因数の和:544

約数の個数: 144

約数和(自身を含む): 271920096

約数和(自身を除く): 189961716

約数列:

[1, 2, 3, 4, 5, 6, 7, 10, 12, 14, 15, 20, 21, 28, 30, 35, 42, 49, 60, 61, 70, 84, 98, 105, 122, 140, 147, 183, 196, 210, 244, 245, 294, 305, 366, 420, 427, 457, 490, 588, 610, 732, 735, 854, 914, 915, 980, 1220, 1281, 1371, 1470, 1708, 1828, 1830, 2135, 2285, 2562, 2742, 2940, 2989, 3199, 3660, 4270, 4570, 5124, 5484, 5978, 6398, 6405, 6855, 8540, 8967, 9140, 9597, 11956, 12796, 12810, 13710, 14945, 15995, 17934, 19194, 22393, 25620, 27420, 27877, 29890, 31990, 35868, 38388, 44786, 44835, 47985, 55754, 59780, 63980, 67179, 83631, 89572, 89670, 95970, 111508, 111965, 134358, 139385, 167262, 179340, 191940, 195139, 223930, 268716, 278770, 334524, 335895, 390278, 418155, 447860, 557540, 585417, 671790, 780556, 836310, 975695, 1170834, 1343580, 1365973, 1672620, 1951390, 2341668, 2731946, 2927085, 3902780, 4097919, 5463892, 5854170, 6829865, 8195838, 11708340, 13659730, 16391676, 20489595, 27319460, 40979190, 81958380]

約数ペア:

[(1, 81958380), (2, 40979190), (3, 27319460), (4, 20489595), (5, 16391676), (6, 13659730), (7, 11708340), (10, 8195838), (12, 6829865), (14, 5854170), (15, 5463892), (20, 4097919), (21, 3902780), (28, 2927085), (30, 2731946), (35, 2341668), (42, 1951390), (49, 1672620), (60, 1365973), (61, 1343580), (70, 1170834), (84, 975695), (98, 836310), (105, 780556), (122, 671790), (140, 585417), (147, 557540), (183, 447860), (196, 418155), (210, 390278), (244, 335895), (245, 334524), (294, 278770), (305, 268716), (366, 223930), (420, 195139), (427, 191940), (457, 179340), (490, 167262), (588, 139385), (610, 134358), (732, 111965), (735, 111508), (854, 95970), (914, 89670), (915, 89572), (980, 83631), (1220, 67179), (1281, 63980), (1371, 59780), (1470, 55754), (1708, 47985), (1828, 44835), (1830, 44786), (2135, 38388), (2285, 35868), (2562, 31990), (2742, 29890), (2940, 27877), (2989, 27420), (3199, 25620), (3660, 22393), (4270, 19194), (4570, 17934), (5124, 15995), (5484, 14945), (5978, 13710), (6398, 12810), (6405, 12796), (6855, 11956), (8540, 9597), (8967, 9140)]