20919200

素因数分解:

$2^5\times 5^2\times {\mathrm{79}}^1\times {\mathrm{331}}^1$

素因数の和:430

約数の個数: 72

約数和(自身を含む): 51871680

約数和(自身を除く): 30952480

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 32, 40, 50, 79, 80, 100, 158, 160, 200, 316, 331, 395, 400, 632, 662, 790, 800, 1264, 1324, 1580, 1655, 1975, 2528, 2648, 3160, 3310, 3950, 5296, 6320, 6620, 7900, 8275, 10592, 12640, 13240, 15800, 16550, 26149, 26480, 31600, 33100, 52298, 52960, 63200, 66200, 104596, 130745, 132400, 209192, 261490, 264800, 418384, 522980, 653725, 836768, 1045960, 1307450, 2091920, 2614900, 4183840, 5229800, 10459600, 20919200]

約数ペア:

[(1, 20919200), (2, 10459600), (4, 5229800), (5, 4183840), (8, 2614900), (10, 2091920), (16, 1307450), (20, 1045960), (25, 836768), (32, 653725), (40, 522980), (50, 418384), (79, 264800), (80, 261490), (100, 209192), (158, 132400), (160, 130745), (200, 104596), (316, 66200), (331, 63200), (395, 52960), (400, 52298), (632, 33100), (662, 31600), (790, 26480), (800, 26149), (1264, 16550), (1324, 15800), (1580, 13240), (1655, 12640), (1975, 10592), (2528, 8275), (2648, 7900), (3160, 6620), (3310, 6320), (3950, 5296)]