12961960

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{89}}^1\times {\mathrm{331}}^1$

素因数の和:442

約数の個数: 64

約数和(自身を含む): 32270400

約数和(自身を除く): 19308440

約数列:

[1, 2, 4, 5, 8, 10, 11, 20, 22, 40, 44, 55, 88, 89, 110, 178, 220, 331, 356, 440, 445, 662, 712, 890, 979, 1324, 1655, 1780, 1958, 2648, 3310, 3560, 3641, 3916, 4895, 6620, 7282, 7832, 9790, 13240, 14564, 18205, 19580, 29128, 29459, 36410, 39160, 58918, 72820, 117836, 145640, 147295, 235672, 294590, 324049, 589180, 648098, 1178360, 1296196, 1620245, 2592392, 3240490, 6480980, 12961960]

約数ペア:

[(1, 12961960), (2, 6480980), (4, 3240490), (5, 2592392), (8, 1620245), (10, 1296196), (11, 1178360), (20, 648098), (22, 589180), (40, 324049), (44, 294590), (55, 235672), (88, 147295), (89, 145640), (110, 117836), (178, 72820), (220, 58918), (331, 39160), (356, 36410), (440, 29459), (445, 29128), (662, 19580), (712, 18205), (890, 14564), (979, 13240), (1324, 9790), (1655, 7832), (1780, 7282), (1958, 6620), (2648, 4895), (3310, 3916), (3560, 3641)]