21008775

素因数分解:

$3^1\times 5^2\times {\mathrm{19}}^1\times {\mathrm{23}}^1\times {\mathrm{641}}^1$

素因数の和:696

約数の個数: 48

約数和(自身を含む): 38211840

約数和(自身を除く): 17203065

約数列:

[1, 3, 5, 15, 19, 23, 25, 57, 69, 75, 95, 115, 285, 345, 437, 475, 575, 641, 1311, 1425, 1725, 1923, 2185, 3205, 6555, 9615, 10925, 12179, 14743, 16025, 32775, 36537, 44229, 48075, 60895, 73715, 182685, 221145, 280117, 304475, 368575, 840351, 913425, 1105725, 1400585, 4201755, 7002925, 21008775]

約数ペア:

[(1, 21008775), (3, 7002925), (5, 4201755), (15, 1400585), (19, 1105725), (23, 913425), (25, 840351), (57, 368575), (69, 304475), (75, 280117), (95, 221145), (115, 182685), (285, 73715), (345, 60895), (437, 48075), (475, 44229), (575, 36537), (641, 32775), (1311, 16025), (1425, 14743), (1725, 12179), (1923, 10925), (2185, 9615), (3205, 6555)]