209539840

素因数分解:

$2^8\times 5^1\times {\mathrm{127}}^1\times {\mathrm{1289}}^1$

素因数の和:1437

約数の個数: 72

約数和(自身を含む): 506257920

約数和(自身を除く): 296718080

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 127, 128, 160, 254, 256, 320, 508, 635, 640, 1016, 1270, 1280, 1289, 2032, 2540, 2578, 4064, 5080, 5156, 6445, 8128, 10160, 10312, 12890, 16256, 20320, 20624, 25780, 32512, 40640, 41248, 51560, 81280, 82496, 103120, 162560, 163703, 164992, 206240, 327406, 329984, 412480, 654812, 818515, 824960, 1309624, 1637030, 1649920, 2619248, 3274060, 5238496, 6548120, 10476992, 13096240, 20953984, 26192480, 41907968, 52384960, 104769920, 209539840]

約数ペア:

[(1, 209539840), (2, 104769920), (4, 52384960), (5, 41907968), (8, 26192480), (10, 20953984), (16, 13096240), (20, 10476992), (32, 6548120), (40, 5238496), (64, 3274060), (80, 2619248), (127, 1649920), (128, 1637030), (160, 1309624), (254, 824960), (256, 818515), (320, 654812), (508, 412480), (635, 329984), (640, 327406), (1016, 206240), (1270, 164992), (1280, 163703), (1289, 162560), (2032, 103120), (2540, 82496), (2578, 81280), (4064, 51560), (5080, 41248), (5156, 40640), (6445, 32512), (8128, 25780), (10160, 20624), (10312, 20320), (12890, 16256)]