21418240

素因数分解:

$2^8\times 5^1\times {\mathrm{29}}^1\times {\mathrm{577}}^1$

素因数の和:627

約数の個数: 72

約数和(自身を含む): 53164440

約数和(自身を除く): 31746200

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 29, 32, 40, 58, 64, 80, 116, 128, 145, 160, 232, 256, 290, 320, 464, 577, 580, 640, 928, 1154, 1160, 1280, 1856, 2308, 2320, 2885, 3712, 4616, 4640, 5770, 7424, 9232, 9280, 11540, 16733, 18464, 18560, 23080, 33466, 36928, 37120, 46160, 66932, 73856, 83665, 92320, 133864, 147712, 167330, 184640, 267728, 334660, 369280, 535456, 669320, 738560, 1070912, 1338640, 2141824, 2677280, 4283648, 5354560, 10709120, 21418240]

約数ペア:

[(1, 21418240), (2, 10709120), (4, 5354560), (5, 4283648), (8, 2677280), (10, 2141824), (16, 1338640), (20, 1070912), (29, 738560), (32, 669320), (40, 535456), (58, 369280), (64, 334660), (80, 267728), (116, 184640), (128, 167330), (145, 147712), (160, 133864), (232, 92320), (256, 83665), (290, 73856), (320, 66932), (464, 46160), (577, 37120), (580, 36928), (640, 33466), (928, 23080), (1154, 18560), (1160, 18464), (1280, 16733), (1856, 11540), (2308, 9280), (2320, 9232), (2885, 7424), (3712, 5770), (4616, 4640)]