21577216

素因数分解:

$2^9\times {\mathrm{17}}^1\times {\mathrm{37}}^1\times {\mathrm{67}}^1$

素因数の和:139

約数の個数: 80

約数和(自身を含む): 47581776

約数和(自身を除く): 26004560

約数列:

[1, 2, 4, 8, 16, 17, 32, 34, 37, 64, 67, 68, 74, 128, 134, 136, 148, 256, 268, 272, 296, 512, 536, 544, 592, 629, 1072, 1088, 1139, 1184, 1258, 2144, 2176, 2278, 2368, 2479, 2516, 4288, 4352, 4556, 4736, 4958, 5032, 8576, 8704, 9112, 9472, 9916, 10064, 17152, 18224, 18944, 19832, 20128, 34304, 36448, 39664, 40256, 42143, 72896, 79328, 80512, 84286, 145792, 158656, 161024, 168572, 291584, 317312, 322048, 337144, 583168, 634624, 674288, 1269248, 1348576, 2697152, 5394304, 10788608, 21577216]

約数ペア:

[(1, 21577216), (2, 10788608), (4, 5394304), (8, 2697152), (16, 1348576), (17, 1269248), (32, 674288), (34, 634624), (37, 583168), (64, 337144), (67, 322048), (68, 317312), (74, 291584), (128, 168572), (134, 161024), (136, 158656), (148, 145792), (256, 84286), (268, 80512), (272, 79328), (296, 72896), (512, 42143), (536, 40256), (544, 39664), (592, 36448), (629, 34304), (1072, 20128), (1088, 19832), (1139, 18944), (1184, 18224), (1258, 17152), (2144, 10064), (2176, 9916), (2278, 9472), (2368, 9112), (2479, 8704), (2516, 8576), (4288, 5032), (4352, 4958), (4556, 4736)]