81391940

素因数分解:

$2^2\times 5^1\times 7^2\times {\mathrm{23}}^2\times {\mathrm{157}}^1$

素因数の和:226

約数の個数: 108

約数和(自身を含む): 209173356

約数和(自身を除く): 127781416

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 23, 28, 35, 46, 49, 70, 92, 98, 115, 140, 157, 161, 196, 230, 245, 314, 322, 460, 490, 529, 628, 644, 785, 805, 980, 1058, 1099, 1127, 1570, 1610, 2116, 2198, 2254, 2645, 3140, 3220, 3611, 3703, 4396, 4508, 5290, 5495, 5635, 7222, 7406, 7693, 10580, 10990, 11270, 14444, 14812, 15386, 18055, 18515, 21980, 22540, 25277, 25921, 30772, 36110, 37030, 38465, 50554, 51842, 72220, 74060, 76930, 83053, 101108, 103684, 126385, 129605, 153860, 166106, 176939, 252770, 259210, 332212, 353878, 415265, 505540, 518420, 581371, 707756, 830530, 884695, 1162742, 1661060, 1769390, 2325484, 2906855, 3538780, 4069597, 5813710, 8139194, 11627420, 16278388, 20347985, 40695970, 81391940]

約数ペア:

[(1, 81391940), (2, 40695970), (4, 20347985), (5, 16278388), (7, 11627420), (10, 8139194), (14, 5813710), (20, 4069597), (23, 3538780), (28, 2906855), (35, 2325484), (46, 1769390), (49, 1661060), (70, 1162742), (92, 884695), (98, 830530), (115, 707756), (140, 581371), (157, 518420), (161, 505540), (196, 415265), (230, 353878), (245, 332212), (314, 259210), (322, 252770), (460, 176939), (490, 166106), (529, 153860), (628, 129605), (644, 126385), (785, 103684), (805, 101108), (980, 83053), (1058, 76930), (1099, 74060), (1127, 72220), (1570, 51842), (1610, 50554), (2116, 38465), (2198, 37030), (2254, 36110), (2645, 30772), (3140, 25921), (3220, 25277), (3611, 22540), (3703, 21980), (4396, 18515), (4508, 18055), (5290, 15386), (5495, 14812), (5635, 14444), (7222, 11270), (7406, 10990), (7693, 10580)]