19816120

素因数分解:

$2^3\times 5^1\times {\mathrm{41}}^1\times {\mathrm{43}}^1\times {\mathrm{281}}^1$

素因数の和:376

約数の個数: 64

約数和(自身を含む): 46902240

約数和(自身を除く): 27086120

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 41, 43, 82, 86, 164, 172, 205, 215, 281, 328, 344, 410, 430, 562, 820, 860, 1124, 1405, 1640, 1720, 1763, 2248, 2810, 3526, 5620, 7052, 8815, 11240, 11521, 12083, 14104, 17630, 23042, 24166, 35260, 46084, 48332, 57605, 60415, 70520, 92168, 96664, 115210, 120830, 230420, 241660, 460840, 483320, 495403, 990806, 1981612, 2477015, 3963224, 4954030, 9908060, 19816120]

約数ペア:

[(1, 19816120), (2, 9908060), (4, 4954030), (5, 3963224), (8, 2477015), (10, 1981612), (20, 990806), (40, 495403), (41, 483320), (43, 460840), (82, 241660), (86, 230420), (164, 120830), (172, 115210), (205, 96664), (215, 92168), (281, 70520), (328, 60415), (344, 57605), (410, 48332), (430, 46084), (562, 35260), (820, 24166), (860, 23042), (1124, 17630), (1405, 14104), (1640, 12083), (1720, 11521), (1763, 11240), (2248, 8815), (2810, 7052), (3526, 5620)]