1280451250

素因数分解:

$2^1\times 5^4\times {\mathrm{13}}^1\times {\mathrm{78797}}^1$

素因数の和:78832

約数の個数: 40

約数和(自身を含む): 2584731996

約数和(自身を除く): 1304280746

約数列:

[1, 2, 5, 10, 13, 25, 26, 50, 65, 125, 130, 250, 325, 625, 650, 1250, 1625, 3250, 8125, 16250, 78797, 157594, 393985, 787970, 1024361, 1969925, 2048722, 3939850, 5121805, 9849625, 10243610, 19699250, 25609025, 49248125, 51218050, 98496250, 128045125, 256090250, 640225625, 1280451250]

約数ペア:

[(1, 1280451250), (2, 640225625), (5, 256090250), (10, 128045125), (13, 98496250), (25, 51218050), (26, 49248125), (50, 25609025), (65, 19699250), (125, 10243610), (130, 9849625), (250, 5121805), (325, 3939850), (625, 2048722), (650, 1969925), (1250, 1024361), (1625, 787970), (3250, 393985), (8125, 157594), (16250, 78797)]