398436640

素因数分解:

$2^5\times 5^1\times 7^2\times {\mathrm{50821}}^1$

素因数の和:50850

約数の個数: 72

約数和(自身を含む): 1095010812

約数和(自身を除く): 696574172

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 32, 35, 40, 49, 56, 70, 80, 98, 112, 140, 160, 196, 224, 245, 280, 392, 490, 560, 784, 980, 1120, 1568, 1960, 3920, 7840, 50821, 101642, 203284, 254105, 355747, 406568, 508210, 711494, 813136, 1016420, 1422988, 1626272, 1778735, 2032840, 2490229, 2845976, 3557470, 4065680, 4980458, 5691952, 7114940, 8131360, 9960916, 11383904, 12451145, 14229880, 19921832, 24902290, 28459760, 39843664, 49804580, 56919520, 79687328, 99609160, 199218320, 398436640]

約数ペア:

[(1, 398436640), (2, 199218320), (4, 99609160), (5, 79687328), (7, 56919520), (8, 49804580), (10, 39843664), (14, 28459760), (16, 24902290), (20, 19921832), (28, 14229880), (32, 12451145), (35, 11383904), (40, 9960916), (49, 8131360), (56, 7114940), (70, 5691952), (80, 4980458), (98, 4065680), (112, 3557470), (140, 2845976), (160, 2490229), (196, 2032840), (224, 1778735), (245, 1626272), (280, 1422988), (392, 1016420), (490, 813136), (560, 711494), (784, 508210), (980, 406568), (1120, 355747), (1568, 254105), (1960, 203284), (3920, 101642), (7840, 50821)]