4009850

素因数分解:

$2^1\times 5^2\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{199}}^1$

素因数の和:255

約数の個数: 48

約数和(自身を含む): 8332800

約数和(自身を除く): 4322950

約数列:

[1, 2, 5, 10, 13, 25, 26, 31, 50, 62, 65, 130, 155, 199, 310, 325, 398, 403, 650, 775, 806, 995, 1550, 1990, 2015, 2587, 4030, 4975, 5174, 6169, 9950, 10075, 12338, 12935, 20150, 25870, 30845, 61690, 64675, 80197, 129350, 154225, 160394, 308450, 400985, 801970, 2004925, 4009850]

約数ペア:

[(1, 4009850), (2, 2004925), (5, 801970), (10, 400985), (13, 308450), (25, 160394), (26, 154225), (31, 129350), (50, 80197), (62, 64675), (65, 61690), (130, 30845), (155, 25870), (199, 20150), (310, 12935), (325, 12338), (398, 10075), (403, 9950), (650, 6169), (775, 5174), (806, 4975), (995, 4030), (1550, 2587), (1990, 2015)]