21409700

素因数分解:

$2^2\times 5^2\times {\mathrm{13}}^1\times {\mathrm{43}}^1\times {\mathrm{383}}^1$

素因数の和:453

約数の個数: 72

約数和(自身を含む): 51330048

約数和(自身を除く): 29920348

約数列:

[1, 2, 4, 5, 10, 13, 20, 25, 26, 43, 50, 52, 65, 86, 100, 130, 172, 215, 260, 325, 383, 430, 559, 650, 766, 860, 1075, 1118, 1300, 1532, 1915, 2150, 2236, 2795, 3830, 4300, 4979, 5590, 7660, 9575, 9958, 11180, 13975, 16469, 19150, 19916, 24895, 27950, 32938, 38300, 49790, 55900, 65876, 82345, 99580, 124475, 164690, 214097, 248950, 329380, 411725, 428194, 497900, 823450, 856388, 1070485, 1646900, 2140970, 4281940, 5352425, 10704850, 21409700]

約数ペア:

[(1, 21409700), (2, 10704850), (4, 5352425), (5, 4281940), (10, 2140970), (13, 1646900), (20, 1070485), (25, 856388), (26, 823450), (43, 497900), (50, 428194), (52, 411725), (65, 329380), (86, 248950), (100, 214097), (130, 164690), (172, 124475), (215, 99580), (260, 82345), (325, 65876), (383, 55900), (430, 49790), (559, 38300), (650, 32938), (766, 27950), (860, 24895), (1075, 19916), (1118, 19150), (1300, 16469), (1532, 13975), (1915, 11180), (2150, 9958), (2236, 9575), (2795, 7660), (3830, 5590), (4300, 4979)]