21347540

素因数分解:

$2^2\times 5^1\times {\mathrm{67}}^1\times {\mathrm{89}}^1\times {\mathrm{179}}^1$

素因数の和:344

約数の個数: 48

約数和(自身を含む): 46267200

約数和(自身を除く): 24919660

約数列:

[1, 2, 4, 5, 10, 20, 67, 89, 134, 178, 179, 268, 335, 356, 358, 445, 670, 716, 890, 895, 1340, 1780, 1790, 3580, 5963, 11926, 11993, 15931, 23852, 23986, 29815, 31862, 47972, 59630, 59965, 63724, 79655, 119260, 119930, 159310, 239860, 318620, 1067377, 2134754, 4269508, 5336885, 10673770, 21347540]

約数ペア:

[(1, 21347540), (2, 10673770), (4, 5336885), (5, 4269508), (10, 2134754), (20, 1067377), (67, 318620), (89, 239860), (134, 159310), (178, 119930), (179, 119260), (268, 79655), (335, 63724), (356, 59965), (358, 59630), (445, 47972), (670, 31862), (716, 29815), (890, 23986), (895, 23852), (1340, 15931), (1780, 11993), (1790, 11926), (3580, 5963)]