20995420

素因数分解:

$2^2\times 5^1\times {\mathrm{29}}^1\times {\mathrm{53}}^1\times {\mathrm{683}}^1$

素因数の和:774

約数の個数: 48

約数和(自身を含む): 46539360

約数和(自身を除く): 25543940

約数列:

[1, 2, 4, 5, 10, 20, 29, 53, 58, 106, 116, 145, 212, 265, 290, 530, 580, 683, 1060, 1366, 1537, 2732, 3074, 3415, 6148, 6830, 7685, 13660, 15370, 19807, 30740, 36199, 39614, 72398, 79228, 99035, 144796, 180995, 198070, 361990, 396140, 723980, 1049771, 2099542, 4199084, 5248855, 10497710, 20995420]

約数ペア:

[(1, 20995420), (2, 10497710), (4, 5248855), (5, 4199084), (10, 2099542), (20, 1049771), (29, 723980), (53, 396140), (58, 361990), (106, 198070), (116, 180995), (145, 144796), (212, 99035), (265, 79228), (290, 72398), (530, 39614), (580, 36199), (683, 30740), (1060, 19807), (1366, 15370), (1537, 13660), (2732, 7685), (3074, 6830), (3415, 6148)]