20768140

素因数分解:

$2^2\times 5^1\times {\mathrm{19}}^1\times {\mathrm{31}}^1\times {\mathrm{41}}^1\times {\mathrm{43}}^1$

素因数の和:143

約数の個数: 96

約数和(自身を含む): 49674240

約数和(自身を除く): 28906100

約数列:

[1, 2, 4, 5, 10, 19, 20, 31, 38, 41, 43, 62, 76, 82, 86, 95, 124, 155, 164, 172, 190, 205, 215, 310, 380, 410, 430, 589, 620, 779, 817, 820, 860, 1178, 1271, 1333, 1558, 1634, 1763, 2356, 2542, 2666, 2945, 3116, 3268, 3526, 3895, 4085, 5084, 5332, 5890, 6355, 6665, 7052, 7790, 8170, 8815, 11780, 12710, 13330, 15580, 16340, 17630, 24149, 25327, 25420, 26660, 33497, 35260, 48298, 50654, 54653, 66994, 96596, 101308, 109306, 120745, 126635, 133988, 167485, 218612, 241490, 253270, 273265, 334970, 482980, 506540, 546530, 669940, 1038407, 1093060, 2076814, 4153628, 5192035, 10384070, 20768140]

約数ペア:

[(1, 20768140), (2, 10384070), (4, 5192035), (5, 4153628), (10, 2076814), (19, 1093060), (20, 1038407), (31, 669940), (38, 546530), (41, 506540), (43, 482980), (62, 334970), (76, 273265), (82, 253270), (86, 241490), (95, 218612), (124, 167485), (155, 133988), (164, 126635), (172, 120745), (190, 109306), (205, 101308), (215, 96596), (310, 66994), (380, 54653), (410, 50654), (430, 48298), (589, 35260), (620, 33497), (779, 26660), (817, 25420), (820, 25327), (860, 24149), (1178, 17630), (1271, 16340), (1333, 15580), (1558, 13330), (1634, 12710), (1763, 11780), (2356, 8815), (2542, 8170), (2666, 7790), (2945, 7052), (3116, 6665), (3268, 6355), (3526, 5890), (3895, 5332), (4085, 5084)]