21991840

素因数分解:

$2^5\times 5^1\times {\mathrm{13}}^1\times {\mathrm{97}}^1\times {\mathrm{109}}^1$

素因数の和:234

約数の個数: 96

約数和(自身を含む): 57047760

約数和(自身を除く): 35055920

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 32, 40, 52, 65, 80, 97, 104, 109, 130, 160, 194, 208, 218, 260, 388, 416, 436, 485, 520, 545, 776, 872, 970, 1040, 1090, 1261, 1417, 1552, 1744, 1940, 2080, 2180, 2522, 2834, 3104, 3488, 3880, 4360, 5044, 5668, 6305, 7085, 7760, 8720, 10088, 10573, 11336, 12610, 14170, 15520, 17440, 20176, 21146, 22672, 25220, 28340, 40352, 42292, 45344, 50440, 52865, 56680, 84584, 100880, 105730, 113360, 137449, 169168, 201760, 211460, 226720, 274898, 338336, 422920, 549796, 687245, 845840, 1099592, 1374490, 1691680, 2199184, 2748980, 4398368, 5497960, 10995920, 21991840]

約数ペア:

[(1, 21991840), (2, 10995920), (4, 5497960), (5, 4398368), (8, 2748980), (10, 2199184), (13, 1691680), (16, 1374490), (20, 1099592), (26, 845840), (32, 687245), (40, 549796), (52, 422920), (65, 338336), (80, 274898), (97, 226720), (104, 211460), (109, 201760), (130, 169168), (160, 137449), (194, 113360), (208, 105730), (218, 100880), (260, 84584), (388, 56680), (416, 52865), (436, 50440), (485, 45344), (520, 42292), (545, 40352), (776, 28340), (872, 25220), (970, 22672), (1040, 21146), (1090, 20176), (1261, 17440), (1417, 15520), (1552, 14170), (1744, 12610), (1940, 11336), (2080, 10573), (2180, 10088), (2522, 8720), (2834, 7760), (3104, 7085), (3488, 6305), (3880, 5668), (4360, 5044)]