19981236

素因数分解:

$2^2\times 3^1\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{31}}^1\times {\mathrm{257}}^1$

素因数の和:325

約数の個数: 96

約数和(自身を含む): 55480320

約数和(自身を除く): 35499084

約数列:

[1, 2, 3, 4, 6, 11, 12, 19, 22, 31, 33, 38, 44, 57, 62, 66, 76, 93, 114, 124, 132, 186, 209, 228, 257, 341, 372, 418, 514, 589, 627, 682, 771, 836, 1023, 1028, 1178, 1254, 1364, 1542, 1767, 2046, 2356, 2508, 2827, 3084, 3534, 4092, 4883, 5654, 6479, 7068, 7967, 8481, 9766, 11308, 12958, 14649, 15934, 16962, 19437, 19532, 23901, 25916, 29298, 31868, 33924, 38874, 47802, 53713, 58596, 77748, 87637, 95604, 107426, 151373, 161139, 175274, 214852, 262911, 302746, 322278, 350548, 454119, 525822, 605492, 644556, 908238, 1051644, 1665103, 1816476, 3330206, 4995309, 6660412, 9990618, 19981236]

約数ペア:

[(1, 19981236), (2, 9990618), (3, 6660412), (4, 4995309), (6, 3330206), (11, 1816476), (12, 1665103), (19, 1051644), (22, 908238), (31, 644556), (33, 605492), (38, 525822), (44, 454119), (57, 350548), (62, 322278), (66, 302746), (76, 262911), (93, 214852), (114, 175274), (124, 161139), (132, 151373), (186, 107426), (209, 95604), (228, 87637), (257, 77748), (341, 58596), (372, 53713), (418, 47802), (514, 38874), (589, 33924), (627, 31868), (682, 29298), (771, 25916), (836, 23901), (1023, 19532), (1028, 19437), (1178, 16962), (1254, 15934), (1364, 14649), (1542, 12958), (1767, 11308), (2046, 9766), (2356, 8481), (2508, 7967), (2827, 7068), (3084, 6479), (3534, 5654), (4092, 4883)]