81885340

素因数分解:

$2^2\times 5^1\times {\mathrm{89}}^1\times {\mathrm{179}}^1\times {\mathrm{257}}^1$

素因数の和:534

約数の個数: 48

約数和(自身を含む): 175543200

約数和(自身を除く): 93657860

約数列:

[1, 2, 4, 5, 10, 20, 89, 178, 179, 257, 356, 358, 445, 514, 716, 890, 895, 1028, 1285, 1780, 1790, 2570, 3580, 5140, 15931, 22873, 31862, 45746, 46003, 63724, 79655, 91492, 92006, 114365, 159310, 184012, 228730, 230015, 318620, 457460, 460030, 920060, 4094267, 8188534, 16377068, 20471335, 40942670, 81885340]

約数ペア:

[(1, 81885340), (2, 40942670), (4, 20471335), (5, 16377068), (10, 8188534), (20, 4094267), (89, 920060), (178, 460030), (179, 457460), (257, 318620), (356, 230015), (358, 228730), (445, 184012), (514, 159310), (716, 114365), (890, 92006), (895, 91492), (1028, 79655), (1285, 63724), (1780, 46003), (1790, 45746), (2570, 31862), (3580, 22873), (5140, 15931)]