20866480

素因数分解:

$2^4\times 5^1\times {\mathrm{17}}^1\times {\mathrm{67}}^1\times {\mathrm{229}}^1$

素因数の和:326

約数の個数: 80

約数和(自身を含む): 52362720

約数和(自身を除く): 31496240

約数列:

[1, 2, 4, 5, 8, 10, 16, 17, 20, 34, 40, 67, 68, 80, 85, 134, 136, 170, 229, 268, 272, 335, 340, 458, 536, 670, 680, 916, 1072, 1139, 1145, 1340, 1360, 1832, 2278, 2290, 2680, 3664, 3893, 4556, 4580, 5360, 5695, 7786, 9112, 9160, 11390, 15343, 15572, 18224, 18320, 19465, 22780, 30686, 31144, 38930, 45560, 61372, 62288, 76715, 77860, 91120, 122744, 153430, 155720, 245488, 260831, 306860, 311440, 521662, 613720, 1043324, 1227440, 1304155, 2086648, 2608310, 4173296, 5216620, 10433240, 20866480]

約数ペア:

[(1, 20866480), (2, 10433240), (4, 5216620), (5, 4173296), (8, 2608310), (10, 2086648), (16, 1304155), (17, 1227440), (20, 1043324), (34, 613720), (40, 521662), (67, 311440), (68, 306860), (80, 260831), (85, 245488), (134, 155720), (136, 153430), (170, 122744), (229, 91120), (268, 77860), (272, 76715), (335, 62288), (340, 61372), (458, 45560), (536, 38930), (670, 31144), (680, 30686), (916, 22780), (1072, 19465), (1139, 18320), (1145, 18224), (1340, 15572), (1360, 15343), (1832, 11390), (2278, 9160), (2290, 9112), (2680, 7786), (3664, 5695), (3893, 5360), (4556, 4580)]