19667840

素因数分解:

$2^7\times 5^1\times {\mathrm{79}}^1\times {\mathrm{389}}^1$

素因数の和:487

約数の個数: 64

約数和(自身を含む): 47736000

約数和(自身を除く): 28068160

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 79, 80, 128, 158, 160, 316, 320, 389, 395, 632, 640, 778, 790, 1264, 1556, 1580, 1945, 2528, 3112, 3160, 3890, 5056, 6224, 6320, 7780, 10112, 12448, 12640, 15560, 24896, 25280, 30731, 31120, 49792, 50560, 61462, 62240, 122924, 124480, 153655, 245848, 248960, 307310, 491696, 614620, 983392, 1229240, 1966784, 2458480, 3933568, 4916960, 9833920, 19667840]

約数ペア:

[(1, 19667840), (2, 9833920), (4, 4916960), (5, 3933568), (8, 2458480), (10, 1966784), (16, 1229240), (20, 983392), (32, 614620), (40, 491696), (64, 307310), (79, 248960), (80, 245848), (128, 153655), (158, 124480), (160, 122924), (316, 62240), (320, 61462), (389, 50560), (395, 49792), (632, 31120), (640, 30731), (778, 25280), (790, 24896), (1264, 15560), (1556, 12640), (1580, 12448), (1945, 10112), (2528, 7780), (3112, 6320), (3160, 6224), (3890, 5056)]