31918900

素因数分解:

$2^2\times 5^2\times {\mathrm{13}}^1\times {\mathrm{43}}^1\times {\mathrm{571}}^1$

素因数の和:641

約数の個数: 72

約数和(自身を含む): 76460384

約数和(自身を除く): 44541484

約数列:

[1, 2, 4, 5, 10, 13, 20, 25, 26, 43, 50, 52, 65, 86, 100, 130, 172, 215, 260, 325, 430, 559, 571, 650, 860, 1075, 1118, 1142, 1300, 2150, 2236, 2284, 2795, 2855, 4300, 5590, 5710, 7423, 11180, 11420, 13975, 14275, 14846, 24553, 27950, 28550, 29692, 37115, 49106, 55900, 57100, 74230, 98212, 122765, 148460, 185575, 245530, 319189, 371150, 491060, 613825, 638378, 742300, 1227650, 1276756, 1595945, 2455300, 3191890, 6383780, 7979725, 15959450, 31918900]

約数ペア:

[(1, 31918900), (2, 15959450), (4, 7979725), (5, 6383780), (10, 3191890), (13, 2455300), (20, 1595945), (25, 1276756), (26, 1227650), (43, 742300), (50, 638378), (52, 613825), (65, 491060), (86, 371150), (100, 319189), (130, 245530), (172, 185575), (215, 148460), (260, 122765), (325, 98212), (430, 74230), (559, 57100), (571, 55900), (650, 49106), (860, 37115), (1075, 29692), (1118, 28550), (1142, 27950), (1300, 24553), (2150, 14846), (2236, 14275), (2284, 13975), (2795, 11420), (2855, 11180), (4300, 7423), (5590, 5710)]