20958790

素因数分解:

$2^1\times 5^1\times {\mathrm{17}}^1\times {\mathrm{31}}^1\times {\mathrm{41}}^1\times {\mathrm{97}}^1$

素因数の和:193

約数の個数: 64

約数和(自身を含む): 42674688

約数和(自身を除く): 21715898

約数列:

[1, 2, 5, 10, 17, 31, 34, 41, 62, 82, 85, 97, 155, 170, 194, 205, 310, 410, 485, 527, 697, 970, 1054, 1271, 1394, 1649, 2542, 2635, 3007, 3298, 3485, 3977, 5270, 6014, 6355, 6970, 7954, 8245, 12710, 15035, 16490, 19885, 21607, 30070, 39770, 43214, 51119, 67609, 102238, 108035, 123287, 135218, 216070, 246574, 255595, 338045, 511190, 616435, 676090, 1232870, 2095879, 4191758, 10479395, 20958790]

約数ペア:

[(1, 20958790), (2, 10479395), (5, 4191758), (10, 2095879), (17, 1232870), (31, 676090), (34, 616435), (41, 511190), (62, 338045), (82, 255595), (85, 246574), (97, 216070), (155, 135218), (170, 123287), (194, 108035), (205, 102238), (310, 67609), (410, 51119), (485, 43214), (527, 39770), (697, 30070), (970, 21607), (1054, 19885), (1271, 16490), (1394, 15035), (1649, 12710), (2542, 8245), (2635, 7954), (3007, 6970), (3298, 6355), (3485, 6014), (3977, 5270)]