18853760

素因数分解:

$2^7\times 5^1\times {\mathrm{89}}^1\times {\mathrm{331}}^1$

素因数の和:439

約数の個数: 64

約数和(自身を含む): 45716400

約数和(自身を除く): 26862640

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 89, 128, 160, 178, 320, 331, 356, 445, 640, 662, 712, 890, 1324, 1424, 1655, 1780, 2648, 2848, 3310, 3560, 5296, 5696, 6620, 7120, 10592, 11392, 13240, 14240, 21184, 26480, 28480, 29459, 42368, 52960, 56960, 58918, 105920, 117836, 147295, 211840, 235672, 294590, 471344, 589180, 942688, 1178360, 1885376, 2356720, 3770752, 4713440, 9426880, 18853760]

約数ペア:

[(1, 18853760), (2, 9426880), (4, 4713440), (5, 3770752), (8, 2356720), (10, 1885376), (16, 1178360), (20, 942688), (32, 589180), (40, 471344), (64, 294590), (80, 235672), (89, 211840), (128, 147295), (160, 117836), (178, 105920), (320, 58918), (331, 56960), (356, 52960), (445, 42368), (640, 29459), (662, 28480), (712, 26480), (890, 21184), (1324, 14240), (1424, 13240), (1655, 11392), (1780, 10592), (2648, 7120), (2848, 6620), (3310, 5696), (3560, 5296)]