21195488

素因数分解:

$2^5\times {\mathrm{19}}^1\times {\mathrm{71}}^1\times {\mathrm{491}}^1$

素因数の和:591

約数の個数: 48

約数和(自身を含む): 44634240

約数和(自身を除く): 23438752

約数列:

[1, 2, 4, 8, 16, 19, 32, 38, 71, 76, 142, 152, 284, 304, 491, 568, 608, 982, 1136, 1349, 1964, 2272, 2698, 3928, 5396, 7856, 9329, 10792, 15712, 18658, 21584, 34861, 37316, 43168, 69722, 74632, 139444, 149264, 278888, 298528, 557776, 662359, 1115552, 1324718, 2649436, 5298872, 10597744, 21195488]

約数ペア:

[(1, 21195488), (2, 10597744), (4, 5298872), (8, 2649436), (16, 1324718), (19, 1115552), (32, 662359), (38, 557776), (71, 298528), (76, 278888), (142, 149264), (152, 139444), (284, 74632), (304, 69722), (491, 43168), (568, 37316), (608, 34861), (982, 21584), (1136, 18658), (1349, 15712), (1964, 10792), (2272, 9329), (2698, 7856), (3928, 5396)]