640431720

素因数分解:

$2^3\times 3^2\times 5^1\times {\mathrm{1778977}}^1$

素因数の和:1778994

約数の個数: 48

約数和(自身を含む): 2081404260

約数和(自身を除く): 1440972540

約数列:

[1, 2, 3, 4, 5, 6, 8, 9, 10, 12, 15, 18, 20, 24, 30, 36, 40, 45, 60, 72, 90, 120, 180, 360, 1778977, 3557954, 5336931, 7115908, 8894885, 10673862, 14231816, 16010793, 17789770, 21347724, 26684655, 32021586, 35579540, 42695448, 53369310, 64043172, 71159080, 80053965, 106738620, 128086344, 160107930, 213477240, 320215860, 640431720]

約数ペア:

[(1, 640431720), (2, 320215860), (3, 213477240), (4, 160107930), (5, 128086344), (6, 106738620), (8, 80053965), (9, 71159080), (10, 64043172), (12, 53369310), (15, 42695448), (18, 35579540), (20, 32021586), (24, 26684655), (30, 21347724), (36, 17789770), (40, 16010793), (45, 14231816), (60, 10673862), (72, 8894885), (90, 7115908), (120, 5336931), (180, 3557954), (360, 1778977)]