28007980

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{1399}}^1$

素因数の和:1439

約数の個数: 96

約数和(自身を含む): 79027200

約数和(自身を除く): 51019220

約数列:

[1, 2, 4, 5, 7, 10, 11, 13, 14, 20, 22, 26, 28, 35, 44, 52, 55, 65, 70, 77, 91, 110, 130, 140, 143, 154, 182, 220, 260, 286, 308, 364, 385, 455, 572, 715, 770, 910, 1001, 1399, 1430, 1540, 1820, 2002, 2798, 2860, 4004, 5005, 5596, 6995, 9793, 10010, 13990, 15389, 18187, 19586, 20020, 27980, 30778, 36374, 39172, 48965, 61556, 72748, 76945, 90935, 97930, 107723, 127309, 153890, 181870, 195860, 200057, 215446, 254618, 307780, 363740, 400114, 430892, 509236, 538615, 636545, 800228, 1000285, 1077230, 1273090, 1400399, 2000570, 2154460, 2546180, 2800798, 4001140, 5601596, 7001995, 14003990, 28007980]

約数ペア:

[(1, 28007980), (2, 14003990), (4, 7001995), (5, 5601596), (7, 4001140), (10, 2800798), (11, 2546180), (13, 2154460), (14, 2000570), (20, 1400399), (22, 1273090), (26, 1077230), (28, 1000285), (35, 800228), (44, 636545), (52, 538615), (55, 509236), (65, 430892), (70, 400114), (77, 363740), (91, 307780), (110, 254618), (130, 215446), (140, 200057), (143, 195860), (154, 181870), (182, 153890), (220, 127309), (260, 107723), (286, 97930), (308, 90935), (364, 76945), (385, 72748), (455, 61556), (572, 48965), (715, 39172), (770, 36374), (910, 30778), (1001, 27980), (1399, 20020), (1430, 19586), (1540, 18187), (1820, 15389), (2002, 13990), (2798, 10010), (2860, 9793), (4004, 6995), (5005, 5596)]