19902105

素因数分解:

$3^4\times 5^1\times {\mathrm{157}}^1\times {\mathrm{313}}^1$

素因数の和:487

約数の個数: 40

約数和(自身を含む): 36018312

約数和(自身を除く): 16116207

約数列:

[1, 3, 5, 9, 15, 27, 45, 81, 135, 157, 313, 405, 471, 785, 939, 1413, 1565, 2355, 2817, 4239, 4695, 7065, 8451, 12717, 14085, 21195, 25353, 42255, 49141, 63585, 126765, 147423, 245705, 442269, 737115, 1326807, 2211345, 3980421, 6634035, 19902105]

約数ペア:

[(1, 19902105), (3, 6634035), (5, 3980421), (9, 2211345), (15, 1326807), (27, 737115), (45, 442269), (81, 245705), (135, 147423), (157, 126765), (313, 63585), (405, 49141), (471, 42255), (785, 25353), (939, 21195), (1413, 14085), (1565, 12717), (2355, 8451), (2817, 7065), (4239, 4695)]