21615860

素因数分解:

$2^2\times 5^1\times 7^3\times {\mathrm{23}}^1\times {\mathrm{137}}^1$

素因数の和:190

約数の個数: 96

約数和(自身を含む): 55641600

約数和(自身を除く): 34025740

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 23, 28, 35, 46, 49, 70, 92, 98, 115, 137, 140, 161, 196, 230, 245, 274, 322, 343, 460, 490, 548, 644, 685, 686, 805, 959, 980, 1127, 1370, 1372, 1610, 1715, 1918, 2254, 2740, 3151, 3220, 3430, 3836, 4508, 4795, 5635, 6302, 6713, 6860, 7889, 9590, 11270, 12604, 13426, 15755, 15778, 19180, 22057, 22540, 26852, 31510, 31556, 33565, 39445, 44114, 46991, 63020, 67130, 78890, 88228, 93982, 110285, 134260, 154399, 157780, 187964, 220570, 234955, 308798, 441140, 469910, 617596, 771995, 939820, 1080793, 1543990, 2161586, 3087980, 4323172, 5403965, 10807930, 21615860]

約数ペア:

[(1, 21615860), (2, 10807930), (4, 5403965), (5, 4323172), (7, 3087980), (10, 2161586), (14, 1543990), (20, 1080793), (23, 939820), (28, 771995), (35, 617596), (46, 469910), (49, 441140), (70, 308798), (92, 234955), (98, 220570), (115, 187964), (137, 157780), (140, 154399), (161, 134260), (196, 110285), (230, 93982), (245, 88228), (274, 78890), (322, 67130), (343, 63020), (460, 46991), (490, 44114), (548, 39445), (644, 33565), (685, 31556), (686, 31510), (805, 26852), (959, 22540), (980, 22057), (1127, 19180), (1370, 15778), (1372, 15755), (1610, 13426), (1715, 12604), (1918, 11270), (2254, 9590), (2740, 7889), (3151, 6860), (3220, 6713), (3430, 6302), (3836, 5635), (4508, 4795)]