21278750

素因数分解:

$2^1\times 5^4\times {\mathrm{29}}^1\times {\mathrm{587}}^1$

素因数の和:638

約数の個数: 40

約数和(自身を含む): 41330520

約数和(自身を除く): 20051770

約数列:

[1, 2, 5, 10, 25, 29, 50, 58, 125, 145, 250, 290, 587, 625, 725, 1174, 1250, 1450, 2935, 3625, 5870, 7250, 14675, 17023, 18125, 29350, 34046, 36250, 73375, 85115, 146750, 170230, 366875, 425575, 733750, 851150, 2127875, 4255750, 10639375, 21278750]

約数ペア:

[(1, 21278750), (2, 10639375), (5, 4255750), (10, 2127875), (25, 851150), (29, 733750), (50, 425575), (58, 366875), (125, 170230), (145, 146750), (250, 85115), (290, 73375), (587, 36250), (625, 34046), (725, 29350), (1174, 18125), (1250, 17023), (1450, 14675), (2935, 7250), (3625, 5870)]