20458480

素因数分解:

$2^4\times 5^1\times 7^2\times {\mathrm{17}}^1\times {\mathrm{307}}^1$

素因数の和:351

約数の個数: 120

約数和(自身を含む): 58777488

約数和(自身を除く): 38319008

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 17, 20, 28, 34, 35, 40, 49, 56, 68, 70, 80, 85, 98, 112, 119, 136, 140, 170, 196, 238, 245, 272, 280, 307, 340, 392, 476, 490, 560, 595, 614, 680, 784, 833, 952, 980, 1190, 1228, 1360, 1535, 1666, 1904, 1960, 2149, 2380, 2456, 3070, 3332, 3920, 4165, 4298, 4760, 4912, 5219, 6140, 6664, 8330, 8596, 9520, 10438, 10745, 12280, 13328, 15043, 16660, 17192, 20876, 21490, 24560, 26095, 30086, 33320, 34384, 36533, 41752, 42980, 52190, 60172, 66640, 73066, 75215, 83504, 85960, 104380, 120344, 146132, 150430, 171920, 182665, 208760, 240688, 255731, 292264, 300860, 365330, 417520, 511462, 584528, 601720, 730660, 1022924, 1203440, 1278655, 1461320, 2045848, 2557310, 2922640, 4091696, 5114620, 10229240, 20458480]

約数ペア:

[(1, 20458480), (2, 10229240), (4, 5114620), (5, 4091696), (7, 2922640), (8, 2557310), (10, 2045848), (14, 1461320), (16, 1278655), (17, 1203440), (20, 1022924), (28, 730660), (34, 601720), (35, 584528), (40, 511462), (49, 417520), (56, 365330), (68, 300860), (70, 292264), (80, 255731), (85, 240688), (98, 208760), (112, 182665), (119, 171920), (136, 150430), (140, 146132), (170, 120344), (196, 104380), (238, 85960), (245, 83504), (272, 75215), (280, 73066), (307, 66640), (340, 60172), (392, 52190), (476, 42980), (490, 41752), (560, 36533), (595, 34384), (614, 33320), (680, 30086), (784, 26095), (833, 24560), (952, 21490), (980, 20876), (1190, 17192), (1228, 16660), (1360, 15043), (1535, 13328), (1666, 12280), (1904, 10745), (1960, 10438), (2149, 9520), (2380, 8596), (2456, 8330), (3070, 6664), (3332, 6140), (3920, 5219), (4165, 4912), (4298, 4760)]