21365576

素因数分解:

$2^3\times {\mathrm{19}}^1\times {\mathrm{29}}^1\times {\mathrm{37}}^1\times {\mathrm{131}}^1$

素因数の和:222

約数の個数: 64

約数和(自身を含む): 45144000

約数和(自身を除く): 23778424

約数列:

[1, 2, 4, 8, 19, 29, 37, 38, 58, 74, 76, 116, 131, 148, 152, 232, 262, 296, 524, 551, 703, 1048, 1073, 1102, 1406, 2146, 2204, 2489, 2812, 3799, 4292, 4408, 4847, 4978, 5624, 7598, 8584, 9694, 9956, 15196, 19388, 19912, 20387, 30392, 38776, 40774, 72181, 81548, 92093, 140563, 144362, 163096, 184186, 281126, 288724, 368372, 562252, 577448, 736744, 1124504, 2670697, 5341394, 10682788, 21365576]

約数ペア:

[(1, 21365576), (2, 10682788), (4, 5341394), (8, 2670697), (19, 1124504), (29, 736744), (37, 577448), (38, 562252), (58, 368372), (74, 288724), (76, 281126), (116, 184186), (131, 163096), (148, 144362), (152, 140563), (232, 92093), (262, 81548), (296, 72181), (524, 40774), (551, 38776), (703, 30392), (1048, 20387), (1073, 19912), (1102, 19388), (1406, 15196), (2146, 9956), (2204, 9694), (2489, 8584), (2812, 7598), (3799, 5624), (4292, 4978), (4408, 4847)]