81250520

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{37}}^1\times {\mathrm{41}}^1\times {\mathrm{103}}^1$

素因数の和:205

約数の個数: 128

約数和(自身を含む): 209139840

約数和(自身を除く): 127889320

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 26, 37, 40, 41, 52, 65, 74, 82, 103, 104, 130, 148, 164, 185, 205, 206, 260, 296, 328, 370, 410, 412, 481, 515, 520, 533, 740, 820, 824, 962, 1030, 1066, 1339, 1480, 1517, 1640, 1924, 2060, 2132, 2405, 2665, 2678, 3034, 3811, 3848, 4120, 4223, 4264, 4810, 5330, 5356, 6068, 6695, 7585, 7622, 8446, 9620, 10660, 10712, 12136, 13390, 15170, 15244, 16892, 19055, 19240, 19721, 21115, 21320, 26780, 30340, 30488, 33784, 38110, 39442, 42230, 49543, 53560, 54899, 60680, 76220, 78884, 84460, 98605, 99086, 109798, 152440, 156251, 157768, 168920, 197210, 198172, 219596, 247715, 274495, 312502, 394420, 396344, 439192, 495430, 548990, 625004, 781255, 788840, 990860, 1097980, 1250008, 1562510, 1981720, 2031263, 2195960, 3125020, 4062526, 6250040, 8125052, 10156315, 16250104, 20312630, 40625260, 81250520]

約数ペア:

[(1, 81250520), (2, 40625260), (4, 20312630), (5, 16250104), (8, 10156315), (10, 8125052), (13, 6250040), (20, 4062526), (26, 3125020), (37, 2195960), (40, 2031263), (41, 1981720), (52, 1562510), (65, 1250008), (74, 1097980), (82, 990860), (103, 788840), (104, 781255), (130, 625004), (148, 548990), (164, 495430), (185, 439192), (205, 396344), (206, 394420), (260, 312502), (296, 274495), (328, 247715), (370, 219596), (410, 198172), (412, 197210), (481, 168920), (515, 157768), (520, 156251), (533, 152440), (740, 109798), (820, 99086), (824, 98605), (962, 84460), (1030, 78884), (1066, 76220), (1339, 60680), (1480, 54899), (1517, 53560), (1640, 49543), (1924, 42230), (2060, 39442), (2132, 38110), (2405, 33784), (2665, 30488), (2678, 30340), (3034, 26780), (3811, 21320), (3848, 21115), (4120, 19721), (4223, 19240), (4264, 19055), (4810, 16892), (5330, 15244), (5356, 15170), (6068, 13390), (6695, 12136), (7585, 10712), (7622, 10660), (8446, 9620)]