21529100

素因数分解:

$2^2\times 5^2\times {\mathrm{41}}^1\times {\mathrm{59}}^1\times {\mathrm{89}}^1$

素因数の和:203

約数の個数: 72

約数和(自身を含む): 49215600

約数和(自身を除く): 27686500

約数列:

[1, 2, 4, 5, 10, 20, 25, 41, 50, 59, 82, 89, 100, 118, 164, 178, 205, 236, 295, 356, 410, 445, 590, 820, 890, 1025, 1180, 1475, 1780, 2050, 2225, 2419, 2950, 3649, 4100, 4450, 4838, 5251, 5900, 7298, 8900, 9676, 10502, 12095, 14596, 18245, 21004, 24190, 26255, 36490, 48380, 52510, 60475, 72980, 91225, 105020, 120950, 131275, 182450, 215291, 241900, 262550, 364900, 430582, 525100, 861164, 1076455, 2152910, 4305820, 5382275, 10764550, 21529100]

約数ペア:

[(1, 21529100), (2, 10764550), (4, 5382275), (5, 4305820), (10, 2152910), (20, 1076455), (25, 861164), (41, 525100), (50, 430582), (59, 364900), (82, 262550), (89, 241900), (100, 215291), (118, 182450), (164, 131275), (178, 120950), (205, 105020), (236, 91225), (295, 72980), (356, 60475), (410, 52510), (445, 48380), (590, 36490), (820, 26255), (890, 24190), (1025, 21004), (1180, 18245), (1475, 14596), (1780, 12095), (2050, 10502), (2225, 9676), (2419, 8900), (2950, 7298), (3649, 5900), (4100, 5251), (4450, 4838)]