21486872

素因数分解:

$2^3\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{71}}^1\times {\mathrm{181}}^1$

素因数の和:288

約数の個数: 64

約数和(自身を含む): 47174400

約数和(自身を除く): 25687528

約数列:

[1, 2, 4, 8, 11, 19, 22, 38, 44, 71, 76, 88, 142, 152, 181, 209, 284, 362, 418, 568, 724, 781, 836, 1349, 1448, 1562, 1672, 1991, 2698, 3124, 3439, 3982, 5396, 6248, 6878, 7964, 10792, 12851, 13756, 14839, 15928, 25702, 27512, 29678, 37829, 51404, 59356, 75658, 102808, 118712, 141361, 151316, 244169, 282722, 302632, 488338, 565444, 976676, 1130888, 1953352, 2685859, 5371718, 10743436, 21486872]

約数ペア:

[(1, 21486872), (2, 10743436), (4, 5371718), (8, 2685859), (11, 1953352), (19, 1130888), (22, 976676), (38, 565444), (44, 488338), (71, 302632), (76, 282722), (88, 244169), (142, 151316), (152, 141361), (181, 118712), (209, 102808), (284, 75658), (362, 59356), (418, 51404), (568, 37829), (724, 29678), (781, 27512), (836, 25702), (1349, 15928), (1448, 14839), (1562, 13756), (1672, 12851), (1991, 10792), (2698, 7964), (3124, 6878), (3439, 6248), (3982, 5396)]