20415678400

素因数分解:

$2^6\times 5^2\times {\mathrm{13}}^1\times {\mathrm{981523}}^1$

素因数の和:981558

約数の個数: 84

約数和(自身を含む): 54099639832

約数和(自身を除く): 33683961432

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 25, 26, 32, 40, 50, 52, 64, 65, 80, 100, 104, 130, 160, 200, 208, 260, 320, 325, 400, 416, 520, 650, 800, 832, 1040, 1300, 1600, 2080, 2600, 4160, 5200, 10400, 20800, 981523, 1963046, 3926092, 4907615, 7852184, 9815230, 12759799, 15704368, 19630460, 24538075, 25519598, 31408736, 39260920, 49076150, 51039196, 62817472, 63798995, 78521840, 98152300, 102078392, 127597990, 157043680, 196304600, 204156784, 255195980, 314087360, 318994975, 392609200, 408313568, 510391960, 637989950, 785218400, 816627136, 1020783920, 1275979900, 1570436800, 2041567840, 2551959800, 4083135680, 5103919600, 10207839200, 20415678400]

約数ペア:

[(1, 20415678400), (2, 10207839200), (4, 5103919600), (5, 4083135680), (8, 2551959800), (10, 2041567840), (13, 1570436800), (16, 1275979900), (20, 1020783920), (25, 816627136), (26, 785218400), (32, 637989950), (40, 510391960), (50, 408313568), (52, 392609200), (64, 318994975), (65, 314087360), (80, 255195980), (100, 204156784), (104, 196304600), (130, 157043680), (160, 127597990), (200, 102078392), (208, 98152300), (260, 78521840), (320, 63798995), (325, 62817472), (400, 51039196), (416, 49076150), (520, 39260920), (650, 31408736), (800, 25519598), (832, 24538075), (1040, 19630460), (1300, 15704368), (1600, 12759799), (2080, 9815230), (2600, 7852184), (4160, 4907615), (5200, 3926092), (10400, 1963046), (20800, 981523)]