21333928

素因数分解:

$2^3\times 7^1\times {\mathrm{11}}^1\times {\mathrm{59}}^1\times {\mathrm{587}}^1$

素因数の和:670

約数の個数: 64

約数和(自身を含む): 50803200

約数和(自身を除く): 29469272

約数列:

[1, 2, 4, 7, 8, 11, 14, 22, 28, 44, 56, 59, 77, 88, 118, 154, 236, 308, 413, 472, 587, 616, 649, 826, 1174, 1298, 1652, 2348, 2596, 3304, 4109, 4543, 4696, 5192, 6457, 8218, 9086, 12914, 16436, 18172, 25828, 32872, 34633, 36344, 45199, 51656, 69266, 90398, 138532, 180796, 242431, 277064, 361592, 380963, 484862, 761926, 969724, 1523852, 1939448, 2666741, 3047704, 5333482, 10666964, 21333928]

約数ペア:

[(1, 21333928), (2, 10666964), (4, 5333482), (7, 3047704), (8, 2666741), (11, 1939448), (14, 1523852), (22, 969724), (28, 761926), (44, 484862), (56, 380963), (59, 361592), (77, 277064), (88, 242431), (118, 180796), (154, 138532), (236, 90398), (308, 69266), (413, 51656), (472, 45199), (587, 36344), (616, 34633), (649, 32872), (826, 25828), (1174, 18172), (1298, 16436), (1652, 12914), (2348, 9086), (2596, 8218), (3304, 6457), (4109, 5192), (4543, 4696)]