21402880

素因数分解:

$2^8\times 5^1\times {\mathrm{23}}^1\times {\mathrm{727}}^1$

素因数の和:771

約数の個数: 72

約数和(自身を含む): 53569152

約数和(自身を除く): 32166272

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 23, 32, 40, 46, 64, 80, 92, 115, 128, 160, 184, 230, 256, 320, 368, 460, 640, 727, 736, 920, 1280, 1454, 1472, 1840, 2908, 2944, 3635, 3680, 5816, 5888, 7270, 7360, 11632, 14540, 14720, 16721, 23264, 29080, 29440, 33442, 46528, 58160, 66884, 83605, 93056, 116320, 133768, 167210, 186112, 232640, 267536, 334420, 465280, 535072, 668840, 930560, 1070144, 1337680, 2140288, 2675360, 4280576, 5350720, 10701440, 21402880]

約数ペア:

[(1, 21402880), (2, 10701440), (4, 5350720), (5, 4280576), (8, 2675360), (10, 2140288), (16, 1337680), (20, 1070144), (23, 930560), (32, 668840), (40, 535072), (46, 465280), (64, 334420), (80, 267536), (92, 232640), (115, 186112), (128, 167210), (160, 133768), (184, 116320), (230, 93056), (256, 83605), (320, 66884), (368, 58160), (460, 46528), (640, 33442), (727, 29440), (736, 29080), (920, 23264), (1280, 16721), (1454, 14720), (1472, 14540), (1840, 11632), (2908, 7360), (2944, 7270), (3635, 5888), (3680, 5816)]