21471890

素因数分解:

$2^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{29}}^1\times {\mathrm{53}}^1\times {\mathrm{127}}^1$

素因数の和:227

約数の個数: 64

約数和(自身を含む): 44789760

約数和(自身を除く): 23317870

約数列:

[1, 2, 5, 10, 11, 22, 29, 53, 55, 58, 106, 110, 127, 145, 254, 265, 290, 319, 530, 583, 635, 638, 1166, 1270, 1397, 1537, 1595, 2794, 2915, 3074, 3190, 3683, 5830, 6731, 6985, 7366, 7685, 13462, 13970, 15370, 16907, 18415, 33655, 33814, 36830, 40513, 67310, 74041, 81026, 84535, 148082, 169070, 195199, 202565, 370205, 390398, 405130, 740410, 975995, 1951990, 2147189, 4294378, 10735945, 21471890]

約数ペア:

[(1, 21471890), (2, 10735945), (5, 4294378), (10, 2147189), (11, 1951990), (22, 975995), (29, 740410), (53, 405130), (55, 390398), (58, 370205), (106, 202565), (110, 195199), (127, 169070), (145, 148082), (254, 84535), (265, 81026), (290, 74041), (319, 67310), (530, 40513), (583, 36830), (635, 33814), (638, 33655), (1166, 18415), (1270, 16907), (1397, 15370), (1537, 13970), (1595, 13462), (2794, 7685), (2915, 7366), (3074, 6985), (3190, 6731), (3683, 5830)]