21997240

素因数分解:

$2^3\times 5^1\times {\mathrm{37}}^1\times {\mathrm{89}}^1\times {\mathrm{167}}^1$

素因数の和:304

約数の個数: 64

約数和(自身を含む): 51710400

約数和(自身を除く): 29713160

約数列:

[1, 2, 4, 5, 8, 10, 20, 37, 40, 74, 89, 148, 167, 178, 185, 296, 334, 356, 370, 445, 668, 712, 740, 835, 890, 1336, 1480, 1670, 1780, 3293, 3340, 3560, 6179, 6586, 6680, 12358, 13172, 14863, 16465, 24716, 26344, 29726, 30895, 32930, 49432, 59452, 61790, 65860, 74315, 118904, 123580, 131720, 148630, 247160, 297260, 549931, 594520, 1099862, 2199724, 2749655, 4399448, 5499310, 10998620, 21997240]

約数ペア:

[(1, 21997240), (2, 10998620), (4, 5499310), (5, 4399448), (8, 2749655), (10, 2199724), (20, 1099862), (37, 594520), (40, 549931), (74, 297260), (89, 247160), (148, 148630), (167, 131720), (178, 123580), (185, 118904), (296, 74315), (334, 65860), (356, 61790), (370, 59452), (445, 49432), (668, 32930), (712, 30895), (740, 29726), (835, 26344), (890, 24716), (1336, 16465), (1480, 14863), (1670, 13172), (1780, 12358), (3293, 6680), (3340, 6586), (3560, 6179)]