777777920

素因数分解:

$2^8\times 5^1\times {\mathrm{19}}^1\times {\mathrm{31981}}^1$

素因数の和:32021

約数の個数: 72

約数和(自身を含む): 1961136240

約数和(自身を除く): 1183358320

約数列:

[1, 2, 4, 5, 8, 10, 16, 19, 20, 32, 38, 40, 64, 76, 80, 95, 128, 152, 160, 190, 256, 304, 320, 380, 608, 640, 760, 1216, 1280, 1520, 2432, 3040, 4864, 6080, 12160, 24320, 31981, 63962, 127924, 159905, 255848, 319810, 511696, 607639, 639620, 1023392, 1215278, 1279240, 2046784, 2430556, 2558480, 3038195, 4093568, 4861112, 5116960, 6076390, 8187136, 9722224, 10233920, 12152780, 19444448, 20467840, 24305560, 38888896, 40935680, 48611120, 77777792, 97222240, 155555584, 194444480, 388888960, 777777920]

約数ペア:

[(1, 777777920), (2, 388888960), (4, 194444480), (5, 155555584), (8, 97222240), (10, 77777792), (16, 48611120), (19, 40935680), (20, 38888896), (32, 24305560), (38, 20467840), (40, 19444448), (64, 12152780), (76, 10233920), (80, 9722224), (95, 8187136), (128, 6076390), (152, 5116960), (160, 4861112), (190, 4093568), (256, 3038195), (304, 2558480), (320, 2430556), (380, 2046784), (608, 1279240), (640, 1215278), (760, 1023392), (1216, 639620), (1280, 607639), (1520, 511696), (2432, 319810), (3040, 255848), (4864, 159905), (6080, 127924), (12160, 63962), (24320, 31981)]