990147280

素因数分解:

$2^4\times 5^1\times {\mathrm{109}}^1\times {\mathrm{271}}^1\times {\mathrm{419}}^1$

素因数の和:812

約数の個数: 80

約数和(自身を含む): 2337350400

約数和(自身を除く): 1347203120

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 109, 218, 271, 419, 436, 542, 545, 838, 872, 1084, 1090, 1355, 1676, 1744, 2095, 2168, 2180, 2710, 3352, 4190, 4336, 4360, 5420, 6704, 8380, 8720, 10840, 16760, 21680, 29539, 33520, 45671, 59078, 91342, 113549, 118156, 147695, 182684, 227098, 228355, 236312, 295390, 365368, 454196, 456710, 472624, 567745, 590780, 730736, 908392, 913420, 1135490, 1181560, 1816784, 1826840, 2270980, 2363120, 3653680, 4541960, 9083920, 12376841, 24753682, 49507364, 61884205, 99014728, 123768410, 198029456, 247536820, 495073640, 990147280]

約数ペア:

[(1, 990147280), (2, 495073640), (4, 247536820), (5, 198029456), (8, 123768410), (10, 99014728), (16, 61884205), (20, 49507364), (40, 24753682), (80, 12376841), (109, 9083920), (218, 4541960), (271, 3653680), (419, 2363120), (436, 2270980), (542, 1826840), (545, 1816784), (838, 1181560), (872, 1135490), (1084, 913420), (1090, 908392), (1355, 730736), (1676, 590780), (1744, 567745), (2095, 472624), (2168, 456710), (2180, 454196), (2710, 365368), (3352, 295390), (4190, 236312), (4336, 228355), (4360, 227098), (5420, 182684), (6704, 147695), (8380, 118156), (8720, 113549), (10840, 91342), (16760, 59078), (21680, 45671), (29539, 33520)]