21153890

素因数分解:

$2^1\times 5^1\times {\mathrm{53}}^1\times {\mathrm{167}}^1\times {\mathrm{239}}^1$

素因数の和:466

約数の個数: 32

約数和(自身を含む): 39191040

約数和(自身を除く): 18037150

約数列:

[1, 2, 5, 10, 53, 106, 167, 239, 265, 334, 478, 530, 835, 1195, 1670, 2390, 8851, 12667, 17702, 25334, 39913, 44255, 63335, 79826, 88510, 126670, 199565, 399130, 2115389, 4230778, 10576945, 21153890]

約数ペア:

[(1, 21153890), (2, 10576945), (5, 4230778), (10, 2115389), (53, 399130), (106, 199565), (167, 126670), (239, 88510), (265, 79826), (334, 63335), (478, 44255), (530, 39913), (835, 25334), (1195, 17702), (1670, 12667), (2390, 8851)]