21237420

素因数分解:

$2^2\times 3^1\times 5^1\times {\mathrm{17}}^1\times {\mathrm{47}}^1\times {\mathrm{443}}^1$

素因数の和:519

約数の個数: 96

約数和(自身を含む): 64447488

約数和(自身を除く): 43210068

約数列:

[1, 2, 3, 4, 5, 6, 10, 12, 15, 17, 20, 30, 34, 47, 51, 60, 68, 85, 94, 102, 141, 170, 188, 204, 235, 255, 282, 340, 443, 470, 510, 564, 705, 799, 886, 940, 1020, 1329, 1410, 1598, 1772, 2215, 2397, 2658, 2820, 3196, 3995, 4430, 4794, 5316, 6645, 7531, 7990, 8860, 9588, 11985, 13290, 15062, 15980, 20821, 22593, 23970, 26580, 30124, 37655, 41642, 45186, 47940, 62463, 75310, 83284, 90372, 104105, 112965, 124926, 150620, 208210, 225930, 249852, 312315, 353957, 416420, 451860, 624630, 707914, 1061871, 1249260, 1415828, 1769785, 2123742, 3539570, 4247484, 5309355, 7079140, 10618710, 21237420]

約数ペア:

[(1, 21237420), (2, 10618710), (3, 7079140), (4, 5309355), (5, 4247484), (6, 3539570), (10, 2123742), (12, 1769785), (15, 1415828), (17, 1249260), (20, 1061871), (30, 707914), (34, 624630), (47, 451860), (51, 416420), (60, 353957), (68, 312315), (85, 249852), (94, 225930), (102, 208210), (141, 150620), (170, 124926), (188, 112965), (204, 104105), (235, 90372), (255, 83284), (282, 75310), (340, 62463), (443, 47940), (470, 45186), (510, 41642), (564, 37655), (705, 30124), (799, 26580), (886, 23970), (940, 22593), (1020, 20821), (1329, 15980), (1410, 15062), (1598, 13290), (1772, 11985), (2215, 9588), (2397, 8860), (2658, 7990), (2820, 7531), (3196, 6645), (3995, 5316), (4430, 4794)]