20235040

素因数分解:

$2^5\times 5^1\times 7^2\times {\mathrm{29}}^1\times {\mathrm{89}}^1$

素因数の和:147

約数の個数: 144

約数和(自身を含む): 58174200

約数和(自身を除く): 37939160

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 29, 32, 35, 40, 49, 56, 58, 70, 80, 89, 98, 112, 116, 140, 145, 160, 178, 196, 203, 224, 232, 245, 280, 290, 356, 392, 406, 445, 464, 490, 560, 580, 623, 712, 784, 812, 890, 928, 980, 1015, 1120, 1160, 1246, 1421, 1424, 1568, 1624, 1780, 1960, 2030, 2320, 2492, 2581, 2842, 2848, 3115, 3248, 3560, 3920, 4060, 4361, 4640, 4984, 5162, 5684, 6230, 6496, 7105, 7120, 7840, 8120, 8722, 9968, 10324, 11368, 12460, 12905, 14210, 14240, 16240, 17444, 18067, 19936, 20648, 21805, 22736, 24920, 25810, 28420, 32480, 34888, 36134, 41296, 43610, 45472, 49840, 51620, 56840, 69776, 72268, 82592, 87220, 90335, 99680, 103240, 113680, 126469, 139552, 144536, 174440, 180670, 206480, 227360, 252938, 289072, 348880, 361340, 412960, 505876, 578144, 632345, 697760, 722680, 1011752, 1264690, 1445360, 2023504, 2529380, 2890720, 4047008, 5058760, 10117520, 20235040]

約数ペア:

[(1, 20235040), (2, 10117520), (4, 5058760), (5, 4047008), (7, 2890720), (8, 2529380), (10, 2023504), (14, 1445360), (16, 1264690), (20, 1011752), (28, 722680), (29, 697760), (32, 632345), (35, 578144), (40, 505876), (49, 412960), (56, 361340), (58, 348880), (70, 289072), (80, 252938), (89, 227360), (98, 206480), (112, 180670), (116, 174440), (140, 144536), (145, 139552), (160, 126469), (178, 113680), (196, 103240), (203, 99680), (224, 90335), (232, 87220), (245, 82592), (280, 72268), (290, 69776), (356, 56840), (392, 51620), (406, 49840), (445, 45472), (464, 43610), (490, 41296), (560, 36134), (580, 34888), (623, 32480), (712, 28420), (784, 25810), (812, 24920), (890, 22736), (928, 21805), (980, 20648), (1015, 19936), (1120, 18067), (1160, 17444), (1246, 16240), (1421, 14240), (1424, 14210), (1568, 12905), (1624, 12460), (1780, 11368), (1960, 10324), (2030, 9968), (2320, 8722), (2492, 8120), (2581, 7840), (2842, 7120), (2848, 7105), (3115, 6496), (3248, 6230), (3560, 5684), (3920, 5162), (4060, 4984), (4361, 4640)]