20703920

素因数分解:

$2^4\times 5^1\times {\mathrm{19}}^1\times {\mathrm{53}}^1\times {\mathrm{257}}^1$

素因数の和:342

約数の個数: 80

約数和(自身を含む): 51827040

約数和(自身を除く): 31123120

約数列:

[1, 2, 4, 5, 8, 10, 16, 19, 20, 38, 40, 53, 76, 80, 95, 106, 152, 190, 212, 257, 265, 304, 380, 424, 514, 530, 760, 848, 1007, 1028, 1060, 1285, 1520, 2014, 2056, 2120, 2570, 4028, 4112, 4240, 4883, 5035, 5140, 8056, 9766, 10070, 10280, 13621, 16112, 19532, 20140, 20560, 24415, 27242, 39064, 40280, 48830, 54484, 68105, 78128, 80560, 97660, 108968, 136210, 195320, 217936, 258799, 272420, 390640, 517598, 544840, 1035196, 1089680, 1293995, 2070392, 2587990, 4140784, 5175980, 10351960, 20703920]

約数ペア:

[(1, 20703920), (2, 10351960), (4, 5175980), (5, 4140784), (8, 2587990), (10, 2070392), (16, 1293995), (19, 1089680), (20, 1035196), (38, 544840), (40, 517598), (53, 390640), (76, 272420), (80, 258799), (95, 217936), (106, 195320), (152, 136210), (190, 108968), (212, 97660), (257, 80560), (265, 78128), (304, 68105), (380, 54484), (424, 48830), (514, 40280), (530, 39064), (760, 27242), (848, 24415), (1007, 20560), (1028, 20140), (1060, 19532), (1285, 16112), (1520, 13621), (2014, 10280), (2056, 10070), (2120, 9766), (2570, 8056), (4028, 5140), (4112, 5035), (4240, 4883)]